Antibiotics

<p>Dicloxacillin sodium salt monohydrate is a beta-lactam antibiotic with action on bacterial cell wall synthesis and is used for treating infections caused by penicillinase-producing bacteria.</p>

<p>Clindamycin sulfoxide is a potent metabolite of the lincosamide antibiotic clindamycin, which is derived from the fermentation product of *Streptomyces lincolnensis*. This compound acts by inhibiting bacterial protein synthesis through binding to the 50S ribosomal subunit, thereby interfering with the translocation steps in protein elongation. The mechanism effectively suppresses the growth of a broad range of Gram-positive bacteria, including *Staphylococcus aureus*, *Streptococcus pneumoniae*, and anaerobic microorganisms.</p>

<p>Chaetoglobosin A is a mycotoxin, which is a secondary metabolite produced by the fungus Chaetomium globosum. This compound exhibits its mode of action by disrupting the cytoskeletal elements within cells, primarily affecting actin polymerization. This interference leads to alterations in cell morphology and can induce apoptosis in certain cell lines.</p>

<p>Aminosidine is a nucleoside analogue that inhibits the HIV-1 reverse transcriptase and the integrase, which are enzymes involved in viral DNA synthesis. Aminosidine is active against Leishmania spp., but not against bacteria. Aminosidine has been shown to be effective in experimental models of human bowel disease and in patients with inflammatory bowel disease. It was also found to be active against wild-type strains of human immunodeficiency virus type 1, but not resistant mutants. The mechanism of action is the inhibition of cellular mitochondrial membrane potential.</p>

<p>Inhibitor of N-glycosylation in eukaryotes</p>

<p>Imipenem acts as an antimicrobial through inhibiting cell wall synthesis of various gram-positive and gram-negative bacteria. It remains very stable in the presence of beta-lactamase (both penicillinase andcephalosporinase) produced by some bacteria, and is a strong inhibitor of beta-lactamases from some gram-negative bacteria that are resistant to most beta-lactam antibiotics.</p>

<p>Cloxacillin benzathine is a beta-lactam antibiotic, which is synthesized from Penicillium fungi-derived penicillins. It acts by inhibiting bacterial cell wall synthesis. The mechanism involves the irreversible inhibition of penicillin-binding proteins (PBPs). This disruption in the bacterial cell wall structure ultimately leads to cell lysis and death.</p>

<p>Erythromycin B is a semisynthetic macrolide antibiotic, which is derived from the actinomycete *Saccharopolyspora erythraea*. Its mode of action involves inhibiting bacterial protein synthesis by binding to the 50S ribosomal subunit. This interference with protein synthesis effectively hampers bacterial growth, making it a potent bacteriostatic agent.</p>

<p>Telavancin is a lipoglycopeptide antibiotic, which is a semi-synthetic derivative of vancomycin. Its source is derived through modifications of the glycopeptide antibiotic, specifically aimed to enhance antibacterial activity. Telavancin functions by inhibiting cell wall synthesis in Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus (MRSA). It does this by binding to the D-alanyl-D-alanine terminus of cell wall precursors, disrupting peptidoglycan polymerization and, consequently, cell wall integrity. Additionally, Telavancin increases membrane permeability and disrupts membrane potential, further enhancing its bactericidal activity.</p>

Boromycin is a macrolide antibiotic, which is derived from the fermentation of certain strains of Streptomyces bacteria. It operates as an ionophore with the ability to transport ions across lipid membranes, effectively disrupting ionic gradients. This mechanism of action compromises essential cellular processes in target organisms, thereby exerting its antimicrobial effects.

<p>Inhibitor of protein synthesis; aminoglycoside</p>

<p>(+)-Madindoline A is a chemical substance that inhibits the growth of cancer cells. It has been shown to inhibit colon cancer cell proliferation and induce apoptosis by inhibiting signal pathways and suppressing inflammatory responses. (+)-Madindoline A is an experimental model for the study of bowel disease and inflammatory diseases, as it can be used to treat both bowel disease and inflammatory diseases. It also has inhibitory effects on the production of proinflammatory cytokines in human protein cells and natural compounds in experimental models. (+)-Madindoline A is found in small amounts in food compositions such as apples, carrots, cauliflower, celery, cucumbers, garlic, leeks, lettuce, onions, peas, peppers, potatoes and tomatoes.</p>

<p>Lincomycin 2-palmitate hydrochloride is a semi-synthetic antibiotic, derived from the natural antibiotic lincomycin through chemical modification. It is sourced from fermentative processes involving the bacterium *Streptomyces lincolnensis*. The compound exerts its action by inhibiting protein synthesis in susceptible bacteria. This occurs through its binding to the 50S subunit of the bacterial ribosome, thereby hindering peptide chain elongation and ultimately arresting bacterial growth.</p>

<p>An aminoglycoside antibiotic.  Found applications in treatment of UTi's as it decreases the ability of bacteria to make protein.</p>

<p>Sitafloxacin is an antibacterial agent belonging to the fluoroquinolone class of antibiotics, which is synthetically derived from chemical processes involving fluorinated quinolones. Its mode of action involves the inhibition of bacterial DNA gyrase and topoisomerase IV, enzymes crucial for bacterial DNA replication and transcription. By interfering with these enzymes, Sitafloxacin effectively hampers bacterial DNA synthesis, leading to the eventual demise of the bacterial cell.</p>

<p>Cefadroxil is a broad-spectrum bactericidal antibiotic that belongs to the cephalosporin family. It is a semi-synthetic penicillin and inhibits bacterial cell wall synthesis through binding to one or more of the penicillin-binding proteins (PBPs). Cefadroxil monohydrate is used as an antibiotic for culture media and has been proven to be effective against methicillin-resistant Staphylococcus aureus (MRSA). In addition, the drug has been shown to have no significant effect on blood tests or microscopic studies.</p>

Camptothecin (CPT) belongs to the alkaloid group of natural products and is a specific DNA topoisomerase I (Topo I) inhibitor (IC50=679 nM) with specificity.

<p>Ionomycin is an ionophore compound with a mode of action that facilitates calcium ion transport across cell membranes. It is used in research to study calcium signaling and T-cell activation.</p>

Potassium clavulanate is a beta-lactamase inhibitor and an antibacterial agent. The presence of potassium clavulanate in culture media inhibits the activity of beta-lactamases, which are enzymes that confer resistance to penicillin and other beta-lactam antibiotics. It also has been shown to be active against bacterial infections such as tuberculosis, sepsis, and pneumonia, where it can inhibit the growth of bacteria by interfering with their ability to form cell walls.

<p>Antibacterial agent with the ability to permeate bacterial membranes and cause cell death. Colistin is a cationic peptide also known as polymyxin E. Colistin is effective in multidrug resistant Gram-positive bacteria such as P. aeruginosa, A. baumannii and K. pneumoniae.</p>

<p>Cephalosporin antibiotic active against gram-positive bacteria including MRSA</p>

<p>Nigericin transports cations across the membrane of the cell and it is used to study anion transport. It can be used as a buffer to control pH value inside of the cell.</p>

<p>7-epi-Clindamycin is a clindamycin derivative, which is a semisynthetic antibiotic derived from the bacterium *Streptomyces lincolnensis*. Its mode of action involves binding to the 50S subunit of the bacterial ribosome, thereby inhibiting protein synthesis. This results in the suppression of bacterial growth, making it effective against certain Gram-positive bacteria and anaerobic species.</p>

Vincristine, a microtubule disruptor, inhibits mitosis in cancer cells, useful in leukemia research.

<p>Deacetylanisomycin is a bacterial metabolite, which is derived from the soil bacterium Streptomyces griseolus. It acts as an inhibitor of protein synthesis by binding to the 60S ribosomal subunit, thus interfering with peptide bond formation during translation. This mode of action is key to its effectiveness in studying the mechanisms of protein synthesis interruption.</p>

<p>Hypothemycin is a natural product that serves as a potent inhibitor of protein kinases. It is derived from the fungus Hypomyces subiculosus and belongs to the class of resorcylic acid lactones. Its mode of action involves binding covalently to the ATP-binding site of kinases, leading to the inhibition of their activity. This covalent modification is achieved through the formation of a Michael-type addition with a reactive ene-diene functionality within its structure. By targeting these critical enzymes, hypothemycin disrupts key signaling pathways that are essential for cell growth and proliferation.</p>

<p>Ceftizoxime alapivoxil is a prodrug antibiotic, which is derived from ceftizoxime, a third-generation cephalosporin. This semi-synthetic source enables the compound to effectively combat a wide range of bacterial infections by improving oral bioavailability compared to its parent compound. Once administered, ceftizoxime alapivoxil is metabolized in the body to release ceftizoxime, which exerts its antibacterial activity by binding to penicillin-binding proteins (PBPs) on bacterial cell walls. This binding action inhibits the transpeptidation step critical for cell wall synthesis, leading to cell lysis and bacterial death.</p>

<p>Thiostrepton is a thiopeptide antibiotic with action on bacterial protein synthesis by binding to the ribosome and is used for treating bacterial infections in veterinary medicine and research applications.</p>

<p>4-Epitetracycline hydrochloride is a tetracycline antibiotic derivative, which is a secondary metabolite derived from bacterial sources, particularly Streptomyces species. It functions primarily by inhibiting protein synthesis in bacteria through binding to the 30S ribosomal subunit, preventing the attachment of aminoacyl-tRNA to the RNA-ribosome complex. This action hinders bacterial growth by interfering with vital processes necessary for bacterial survival and replication.</p>

<p>Inhibitor of DNA replication; aminoglycoside class</p>

<p>Cefodizime is a third-generation cephalosporin antibiotic, which is derived from the fungus Acremonium. It exerts its bactericidal effects by inhibiting bacterial cell wall synthesis. This action is achieved through binding to penicillin-binding proteins (PBPs), leading to the interruption of peptidoglycan cross-linking essential for the bacterial cell wall integrity. The breakdown of cell wall synthesis results in the lysis and death of the bacterial cell.</p>

<p>Cyclosporin L is an immunosuppressive agent, which is a cyclic polypeptide derived from the soil fungus Tolypocladium inflatum. It primarily functions by inhibiting the activity of calcineurin, a key phosphatase involved in the activation of T-cells. This inhibition prevents the transcription of interleukin-2 and other cytokines critical for T-cell proliferation.</p>

<p>Porfiromycin is an antineoplastic antibiotic with action on DNA alkylation and cross-linking and is used for research on cancer treatment, particularly for hypoxic tumors.</p>

<p>Cefquinome is a broad-spectrum antibiotic, which is a fourth-generation cephalosporin. It is derived from the β-lactam class of antibiotics and is specifically designed for veterinary applications. Its mode of action involves the inhibition of bacterial cell wall synthesis, leading to cell lysis and death. This action is facilitated through the binding of cefquinome to penicillin-binding proteins, which undermines the structural integrity of bacterial cell walls, proving effective against both Gram-positive and Gram-negative bacteria.</p>

<p>Inhibitor of protein synthesis; macrolide class</p>

<p>Oxacillin sodium is a beta-lactam antibiotic with action on bacterial cell wall synthesis and is used for treating infections caused by penicillin-resistant Staphylococcus aureus.</p>

<p>Erythromycin derivative</p>

<p>Dequalinium chloride is a novel, broad spectrum antimicrobial agent with a mechanism of action that inhibits the mitochondria-dependent respiratory chain. Studies have shown that it inhibits the growth of resistant microorganisms in cell-based experiments and in bacterial infections. Dequalinium chloride also has cytopathic effects on thp-1 cells, which are specific for Mycobacterium tuberculosis. In addition to inhibiting mitochondria-dependent respiration, this compound also increases acetylcholine receptor sensitivity in A549 lung cancer cells. Dequalinium chloride is a quaternary ammonium cation and has been shown to be effective against clinical isolates and inhibitory concentrations of a variety of virus species, including human rhinovirus (HRV) and Coxsackie virus type B4 (CoxB4).</p>

<p>PNU 142300 is a non-peptidyl anticoagulant, which is a synthetically derived small molecule. This compound is sourced from advanced chemical synthesis techniques that focus on mimicking biological activity through non-biological materials. PNU 142300 acts by specifically inhibiting factor Xa, a crucial enzyme in the coagulation cascade responsible for the conversion of prothrombin to thrombin. By targeting this enzyme, it effectively prevents the formation of blood clots, thereby exhibiting potent anticoagulant properties.</p>

<p>Polymyxin B nonapeptide hydrochloride is a potent antibiotic compound derived from the bacterium *Bacillus polymyxa*. As a cationic polypeptide, it exhibits its antibacterial activity by interacting with the lipopolysaccharides and phospholipids in the bacterial cell membrane, leading to increased permeability and ultimately causing cell lysis. The compound is specifically effective against a broad range of Gram-negative bacteria, making it crucial in studying antibiotic resistance mechanisms.</p>

<p>Oligomycin B is an antibiotic compound, which is derived from Streptomyces species. It is an inhibitor of the mitochondrial ATP synthase complex, specifically targeting the F₀ subunit of ATP synthase. This action obstructs the proton channel, preventing the flow of protons across the mitochondrial membrane. As a result, Oligomycin B effectively halts ATP synthesis by oxidative phosphorylation, which is crucial for the survival of aerobic organisms.</p>

<p>Streptidine dihydrochloride is a biochemical compound, specifically a derivative of streptomycin, which is obtained through chemical modification of the aminoglycoside antibiotic streptomycin. It is composed of streptidine, a constituent sugar derivative, that is integral to the structure of streptomycin, rendered as a hydrochloride salt to enhance solubility and stability.</p>

<p>Rifamdin is an antibiotic, which is a chemical substance derived from the source compound rifampicin. Its mode of action involves the inhibition of bacterial DNA-dependent RNA polymerase, which effectively suppresses bacterial RNA synthesis, leading to cell death. This mechanism primarily targets Mycobacterium tuberculosis, the causative agent of tuberculosis.</p>

<p>Gemifloxacin is an antibacterial agent primarily classified as a fluoroquinolone antibiotic, which is a synthetic compound derived from chemical processes in pharmaceutical manufacturing. Its mechanism of action involves the inhibition of key bacterial enzymes, namely DNA gyrase and topoisomerase IV. These enzymes are crucial for bacterial DNA replication, transcription, repair, and recombination. By obstructing these enzymes, Gemifloxacin effectively inhibits bacterial cell division and growth, leading to the eradication of susceptible bacterial strains.</p>

<p>Inhibitor of protein synthesis; aminoglycoside</p>

<p>Kasugamycin is an aminoglycoside antibiotic, which is derived from the actinomycete Streptomyces kasugaensis. Its mode of action involves the inhibition of protein synthesis by interfering with the function of the 30S ribosomal subunit, ultimately preventing the growth and proliferation of sensitive organisms. In agricultural contexts, Kasugamycin is primarily utilized to control bacterial and fungal diseases in a variety of crops, including rice and fruit trees. It is particularly effective against Xanthomonas oryzae, which causes bacterial leaf blight in rice, and other pathogenic organisms detrimental to plant health. The application of Kasugamycin has been an important tool for integrated pest management programs focusing on sustainable agricultural practices. As a compound with a specific mode of activity, it helps to reduce the environmental impact typically associated with broader-spectrum antibiotics, while offering target-specific disease control. Its careful application supports the minimization of resistance development, ensuring continued efficacy in protecting crop yields.</p>

<p>Fosmidomycin sodium is an antibiotic compound, which is derived from phosphonic acid. It functions as an inhibitor of the enzyme 1-deoxy-D-xylulose 5-phosphate reductoisomerase (DXR), crucial in the non-mevalonate pathway of isoprenoid biosynthesis. By targeting this enzyme, fosmidomycin sodium disrupts the production of isoprenoids, essential components for the growth and survival of certain bacteria and parasites.</p>

<p>Cefacetrile sodium is a broad-spectrum antibiotic belonging to the cephalosporin class. It is a semi-synthetic derivative sourced from cephalosporin C, a naturally occurring compound derived from the Acremonium fungus. Its mode of action involves the inhibition of bacterial cell wall synthesis. This occurs by binding to penicillin-binding proteins within the bacterial cell membrane, ultimately leading to cell lysis and death due to the inability to synthesize peptidoglycan, a critical component of the bacterial cell wall.</p>

<p>Chlortetracycline-13C-d3 hydrochloride is a stable isotope-labeled antibiotic with action on bacterial protein synthesis inhibition and is used for research in bacterial resistance and analytical studies.</p>

<p>Norvancomycin trifluoroacetate is an antibiotic compound, which is a glycopeptide derived from the bacterium Amycolatopsis orientalis. Its mode of action involves inhibiting bacterial cell wall synthesis. Specifically, Norvancomycin disrupts the cross-linking of peptidoglycan layers in the bacterial cell wall by binding to the D-alanyl-D-alanine terminus of cell wall precursors. This disruption weakens the bacterial cell wall, ultimately leading to cell lysis and death, thereby exerting a bactericidal effect.</p>

<p>Enrofloxacin HCl is a fluoroquinolone antibiotic, which is a synthetic compound derived from chemical synthesis. Its mode of action involves the inhibition of bacterial DNA gyrase and topoisomerase IV, critical enzymes in bacterial DNA replication and transcription processes. This action disrupts bacterial cellular division and transcription, leading to cell death.</p>

3'-N-Desmethyl-3'-N-formyl azithromycin is a semi-synthetic macrolide antibiotic, derived from the well-known azithromycin. It is created through structural modification, where the 3'-N-demethylated and 3'-N-formyl groups enhance its pharmacokinetic properties and potentially improve its antimicrobial efficacy.

<p>Geneticin is very efficient against gram-negative bacteria, however it is not applied for treating infections due to high renal toxicity. Geneticin and its resistance genes found application in the selection of transgenic cell lines including yeasts such as P. pastoris and S. serevisiae, other eukaryotic cell lines such as CHO or HEK293, but also plant cells and bacterial cells.</p>

<p>Streptidine is an amino cyclitol, which is a component of certain aminoglycoside antibiotics. This compound originates from the actinomycete *Streptomyces griseus*, a soil bacterium known for its ability to produce a variety of antibiotics. Streptidine plays a crucial role in the mechanism of aminoglycosides by contributing to the binding affinity of these antibiotics to the bacterial ribosome.</p>

<p>Chlortetracycline is a tetracycline antibiotic, which is derived from the bacterium *Streptomyces aureofaciens*. It functions by inhibiting protein synthesis through binding to the 30S ribosomal subunit, thereby preventing the attachment of aminoacyl-tRNA to the mRNA-ribosome complex. This mechanism effectively impedes the growth and replication of both gram-positive and gram-negative bacteria.</p>

<p>Clindamycin-d3 hydrochloride is an isotopically labeled pharmaceutical compound, specifically designed for use in the field of analytical chemistry and pharmacokinetics. It is derived from clindamycin, a known antibiotic sourced from modifications of the naturally occurring compound lincomycin, produced by the actinobacterium Streptomyces lincolnensis. The incorporation of deuterium atoms, replacing hydrogen, allows for its use in sophisticated analytical methods such as mass spectrometry, where it serves to trace the metabolic pathways and to quantify the bioavailability and distribution of clindamycin in biological systems with high precision.</p>

<p>Inhibitor of protein synthesis; glycylcycline class</p>

<p>3'-N-Desmethyl-3'-N-tosyl azithromycin is a semi-synthetic macrolide antibiotic analog, which is a derivative of azithromycin, a well-known member of the macrolide class of antibiotics. This compound is synthesized through chemical modifications of the parent molecule, azithromycin, to potentially enhance its pharmacokinetic and pharmacodynamic properties.</p>

<p>Lysostaphin, from Staphylococcus staphylolyticus is a zinc metalloenzyme with action on bacterial cell walls by cleaving polyglycine cross-links and is used for treating staphylococcal infections and in research applications.</p>

<p>2'-O-Acetylspiramycin I is a semi-synthetic derivative of spiramycin, which is a macrolide antibiotic originally sourced from the bacterium *Streptomyces ambofaciens*. The modification involves the acetylation at the 2'-hydroxyl group of spiramycin, enhancing certain pharmacokinetic properties.</p>

<p>Erythromycin lactobionate is a macrolide antibiotic, which is derived from the bacterium *Saccharopolyspora erythraea*. Its mode of action involves binding to the 50S subunit of the bacterial ribosome, thereby inhibiting protein synthesis and leading to the suppression of bacterial growth. This mechanism effectively targets gram-positive bacteria and some gram-negative bacteria, making it a crucial agent in the fight against various bacterial infections.</p>

<p>Metabolite of rifampicin</p>

<p>Inhibitor of protein synthesis; aminoglycoside</p>

<p>Inhibitor of protein synthesis; lincosamide</p>

<p>7-O-Demethyl rapamycin is a macrolide compound, which is a derivative of rapamycin, originally sourced from the bacterial species *Streptomyces hygroscopicus*. This compound operates by binding to the FK506-binding protein 12 (FKBP12), forming a complex that inhibits the mammalian target of rapamycin (mTOR) pathway. This inhibition interferes with cellular processes such as cell growth, proliferation, and survival by altering the phosphorylation state of downstream targets.</p>

<p>Cefoxitin EP impurity B is a chemical reference standard, which is derived from the synthesis and purification processes involved in producing Cefoxitin. As an impurity standard, its primary role is to serve as a benchmark for quality control in pharmaceutical formulations. The mode of action of Cefoxitin EP impurity B involves the structural analysis and quantification of impurity levels, ensuring that the primary pharmaceutical products meet necessary safety and efficacy criteria.</p>

<p>Mitomycin C analogue</p>

<p>Cefotiam is a broad-spectrum cephalosporin antibiotic, which is a beta-lactam compound derived from the mold Acremonium. It functions by inhibiting bacterial cell wall synthesis, particularly by targeting penicillin-binding proteins, which leads to cell lysis and death in susceptible bacteria. This mechanism of action makes it effective against various Gram-positive and Gram-negative bacteria.</p>

<p>Cefotaxime sodium - Sterile grade is a cephalosporin antibiotic, which is derived from the beta-lactam class of antibacterial agents. It effectively disrupts bacterial cell wall synthesis by binding to and inhibiting penicillin-binding proteins, leading to cell lysis and death. This mechanism of action is potent against a variety of Gram-positive and Gram-negative bacteria, making it a valuable tool in clinical settings.</p>

<p>6,11-Di-O-methyl erythromycin is a semi-synthetic derivative of erythromycin, which is a macrolide antibiotic originally sourced from the bacterium *Saccharopolyspora erythraea*. This compound is produced through chemical modification of the natural antibiotic to improve its pharmacokinetic properties, such as stability and absorption.</p>

<p>N-Desisobutyl-N-propyl rifabutin is a synthetic derivative of rifabutin, which is an antibiotic belonging to the rifamycin class. This compound is sourced from modifications of the parent molecule rifabutin, itself derived from the rifamycin family produced by the bacterium Amycolatopsis, traditionally used for its antimicrobial properties. The mode of action involves the inhibition of bacterial RNA polymerase, effectively preventing the transcription process necessary for bacterial replication and protein synthesis. This disruption of RNA synthesis provides potent antimicrobial activity.</p>

<p>Aclacinomycin HCl is a cytotoxic antibiotic that inhibits the growth of tumor cells. It has been shown to induce apoptosis in human leukemia cells by altering the transmembrane potential and inhibiting cell proliferation. Aclacinomycin HCl also induces DNA damage response, which leads to caspase activities and cell death. This drug is highly selective for tumor cells, with no effect on normal cells. It has been shown to be effective against primary liver cancer in animal models, as well as developmental disorders such as autism spectrum disorder (ASD).</p>

<p>Aphidicolin is a tetracyclic diterpenoid that acts as a potent inhibitor of DNA polymerase. Derived from the fungus *Cephalosporium aphidicola*, it is primarily identified for its ability to impede DNA synthesis by targeting eukaryotic DNA polymerase α. This selective inhibition disrupts replication processes, making it a crucial tool for studying cell cycle dynamics.</p>

<p>Sarecycline is a tetracycline-class antibiotic, which is derived from naturally occurring tetracycline antibiotics. Its mode of action involves inhibition of bacterial protein synthesis by binding to the 30S ribosomal subunit, thereby preventing the addition of amino acids to nascent peptide chains. This specific mechanism disrupts bacterial growth, making Sarecycline effective against certain strains of bacteria implicated in dermatological conditions.</p>

<p>Sulbenicillin is a semi-synthetic penicillin antibiotic, which is derived from 6-aminopenicillanic acid, a natural precursor in the biosynthesis of penicillins. With its beta-lactam structure, Sulbenicillin disrupts bacterial cell wall synthesis by inhibiting penicillin-binding proteins, which are essential enzymes in the cross-linking of peptidoglycan layers. This disruption compromises the structural integrity of the bacterial cell wall, resulting in cell lysis and death, particularly in Gram-negative bacteria.</p>

<p>Thienamycin is a β-lactam antibiotic, which originates from the fermentation of the bacterium *Streptomyces cattleya*. Its mode of action involves inhibiting the synthesis of bacterial cell walls. Thienamycin accomplishes this by binding to penicillin-binding proteins (PBPs) critical for peptidoglycan construction, thereby disrupting cell wall integrity and leading to bacterial lysis.</p>

<p>Tropodithietic acid is a bioactive compound, which is a potent antibacterial agent derived from certain marine bacteria, including the genus Phaeobacter. This antibiotic is characterized by its ability to disrupt quorum sensing, a mechanism that bacteria use for communication and coordination of group behaviors, including virulence. By interfering with this process, tropodithietic acid impedes bacterial colonization and biofilm formation, effectively inhibiting pathogenic activity.</p>

<p>3'-N,N-Di(desmethyl)-3'-N-formyl azithromycin is a semisynthetic macrolide antibiotic derivative, which is synthesized through chemical modification of azithromycin. Azithromycin is originally derived from erythromycin, which is produced by the bacterium Saccharopolyspora erythraea. The modifications in this derivative result in enhanced specificity and altered pharmacokinetic properties compared to the parent compound.</p>

<p>Herbimycin is an antibiotic, which is a natural product derived from Streptomyces bacteria. It functions primarily as a tyrosine kinase inhibitor, disrupting cellular signaling pathways by binding to the ATP-binding site of kinases and inhibiting phosphorylation events. This mode of action makes it an effective tool for scientists studying signal transduction processes and oncogenic transformation.</p>

<p>Sulfadiazine-d4 is an isotopically labeled antibiotic, which is a derivative of sulfadiazine containing four deuterium atoms. This compound is synthesized using advanced chemical techniques to replace hydrogen atoms with deuterium in the molecular structure. The mechanism of action involves inhibition of bacterial dihydropteroate synthase, an enzyme critical in the folate synthesis pathway. By preventing the production of folic acid, sulfadiazine-d4 effectively halts bacterial growth and replication.</p>

<p>Piperacillin oxalylamide is an investigational antibiotic, which is a synthetic derivative of the widely used β-lactam antibiotic, piperacillin. Its development is rooted in the quest to combat β-lactamase-producing resistant bacterial strains, which are a growing threat in clinical settings. It operates by inhibiting bacterial cell wall synthesis, similar to other β-lactam antibiotics, but possesses a modified structure that enhances its resistance to enzymatic degradation by β-lactamases.</p>

<p>Oligomycin A is a macrolide antibiotic, which is isolated from the Streptomyces species of bacteria. Its mode of action involves inhibiting ATP synthase by binding to the F_O subunit of the enzyme complex in the mitochondrial membrane. This binding effectively stops the flow of protons across the membrane, which is critical for ATP generation through oxidative phosphorylation.</p>

<p>6'-N-Cbz-kanamycin A is a semi-synthetic aminoglycoside antibiotic derivative, specifically a Cbz (carbobenzyloxy) protected form of kanamycin A. It is derived from the natural product kanamycin, which is an antibiotic obtained from the bacterium *Streptomyces kanamyceticus*. The modification involves the introduction of a protective Cbz group at the 6' position, which can improve solubility, stability, or enable further chemical modifications.</p>

<p>Cephamycin C is a cephalosporin antibiotic, which is a type of β-lactam antibiotic. It is derived from the fermentation process of certain Streptomyces species and other actinomycetes. Its mode of action involves inhibiting bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs). This inhibition disrupts the structural integrity of the bacterial cell wall, leading to cell lysis and death.</p>

<p>Narasin is an ionophore antibiotic, which is a fermentation product derived from certain strains of the bacterium *Streptomyces aureofaciens*. It functions by disrupting the ion gradients across cell membranes, specifically facilitating the transport of sodium and potassium ions. This action interferes with the energy metabolism of certain pathogenic microorganisms, rendering them unable to proliferate effectively.</p>

<p>L-Carnitine fumarate is a compound that functions as a dietary supplement, which is synthesized by combining L-carnitine, an amino acid derivative naturally found in the body, with fumaric acid. This product is primarily sourced from fermentation or chemical synthesis processes to produce L-carnitine, which is then reacted with fumaric acid to form the fumarate salt. This combination enhances the stability and bioavailability of L-carnitine.</p>