Building Blocks
Sottocategorie di "Building Blocks"
- Acidi boronici e derivati dell'acido boronico(5.778 prodotti)
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- Building Blocks Idrocarburici(6.099 prodotti)
- Building Blocks organici(61.038 prodotti)
Trovati 205376 prodotti di "Building Blocks"
4-({3-Oxo-2-azatricyclo[6.3.1.0,4,12]dodeca-1(11),4(12),5,7,9-pentaen-2-yl}methyl)benzohydrazide
CAS:Versatile small molecule scaffoldFormula:C19H15N3O2Purezza:Min. 95%Peso molecolare:317.3 g/mol1-(4-Thiophen-2-yl-phenyl)-ethanone
CAS:Versatile small molecule scaffold
Formula:C12H10OSPurezza:Min. 95%Peso molecolare:202.27 g/mol4-(1,3,4-Oxadiazol-2-yl)aniline
CAS:Versatile small molecule scaffold
Formula:C8H7N3OPurezza:Min. 95%Peso molecolare:161.16 g/mol2-{[4-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)phenyl]methyl}butanoic acid
CAS:Versatile small molecule scaffold
Formula:C26H25NO4Purezza:Min. 95%Peso molecolare:415.5 g/mol1-(1H-1,2,3,4-Tetrazol-5-yl)propan-2-ol
CAS:Versatile small molecule scaffoldFormula:C4H8N4OPurezza:Min. 95%Peso molecolare:128.1 g/mol6-amino-2-ethyl-2,3-dihydro-1H-isoindol-1-one
CAS:Versatile small molecule scaffold
Formula:C10H12N2OPurezza:Min. 95%Peso molecolare:176.22 g/mol3-Methyl-5-(propan-2-yl)-1H-pyrazole-4-carboxylic acid
CAS:Versatile small molecule scaffold
Formula:C8H12N2O2Purezza:Min. 95%Peso molecolare:168.19 g/mol1-(2-Methoxyphenyl)-1H-pyrazole-5-carbaldehyde
CAS:Versatile small molecule scaffold
Formula:C11H10N2O2Purezza:Min. 95%Peso molecolare:202.21 g/mol4-Chloro-6-cyclopropyl-2-methylpyrimidine
CAS:Versatile small molecule scaffoldFormula:C8H9ClN2Purezza:Min. 95%Peso molecolare:168.62 g/mol1-(3-Ethoxyphenyl)propan-1-ol
CAS:Versatile small molecule scaffold
Formula:C11H16O2Purezza:Min. 95%Peso molecolare:180.24 g/mol5-(1,3-Dioxolan-2-yl)furan-2-carbonitrile
CAS:Versatile small molecule scaffold
Formula:C8H7NO3Purezza:Min. 95%Peso molecolare:165.15 g/molPiperazine-2-carboxamide
CAS:Piperazine-2-carboxamide is a synthetic drug that is used to treat tuberculosis. It binds to the mycolic acid of the bacterial cell wall, preventing it from forming an outer layer and disrupting its function. Piperazine-2-carboxamide also inhibits the synthesis of fatty acids and amines in bacteria, which are necessary for their survival. This drug can be synthesized by reacting piperazine with formaldehyde and acetamide.
Formula:C5H11N3OPurezza:Min. 95%Peso molecolare:129.16 g/mol[2-(1H-Indol-4-yl)ethyl]dimethylamine
CAS:Prodotto controllatoVersatile small molecule scaffold
Formula:C12H16N2Purezza:Min. 95%Peso molecolare:188.27 g/mol3-Bromo-2-chloro-5-(2-nitroprop-1-en-1-yl)thiophene
CAS:Versatile small molecule scaffoldFormula:C7H5BrClNO2SPurezza:Min. 95%Peso molecolare:282.54 g/mol2-Methyl-2-(5-methylpyridin-2-yl)propanenitrile
CAS:Versatile small molecule scaffold
Formula:C10H12N2Purezza:Min. 95%Peso molecolare:160.22 g/mol4-Methyl-cyclohexanemethanamine
CAS:Versatile small molecule scaffold
Formula:C8H17NPurezza:Min. 95%Peso molecolare:127.23 g/mol4-Bromomethyl-4'-methyl-2,2'-bipyridine
CAS:Please enquire for more information about 4-Bromomethyl-4'-methyl-2,2'-bipyridine including the price, delivery time and more detailed product information at the technical inquiry form on this page
Formula:C12H11BrN2Purezza:Min. 91.0 Area-%Peso molecolare:263.14 g/mol2-(4-Acetylbenzenesulfonamido)propanoic acid
CAS:Versatile small molecule scaffoldFormula:C11H13NO5SPurezza:Min. 95%Peso molecolare:271.29 g/mol1-[(3-Phenyl-1,2-oxazol-5-yl)methyl]piperazine dihydrochloride
CAS:Versatile small molecule scaffoldFormula:C14H19Cl2N3OPurezza:Min. 95%Peso molecolare:316.2 g/mol2-[2-(Furan-3-yl)-1,3-thiazol-4-yl]acetic acid
CAS:Versatile small molecule scaffold
Formula:C9H7NO3SPurezza:Min. 95%Peso molecolare:209.22 g/mol4-Cyclopentylbutan-2-amine hydrochloride
CAS:Versatile small molecule scaffoldFormula:C9H20ClNPurezza:Min. 95%Peso molecolare:177.71 g/mol4-(Hydroxymethyl)-1-methyl-5-(thiophen-2-yl)pyrrolidin-2-one
CAS:Versatile small molecule scaffold
Formula:C10H13NO2SPurezza:Min. 95%Peso molecolare:211.28 g/molMethyl 4-bromo-5-hydroxy-1-methyl-1H-pyrazole-3-carboxylate
CAS:Versatile small molecule scaffold
Formula:C6H7BrN2O3Purezza:Min. 95%Peso molecolare:235.04 g/molN-(3-Cyanophenyl)acetamide
CAS:N-(3-Cyanophenyl)acetamide is a hydrogen-bonding molecule that has been detected in the gas phase. It has also been observed to interact with water, forming hydrogen bonding interactions and solvatochromism. The equilibrium of N-(3-cyanophenyl)acetamide can be shifted by changing the solvent conditions and pH. This molecule has three conformations when it is in the gaseous phase, including a planar conformation. In addition, N-(3-cyanophenyl)acetamide can be used as a probe for determining hydrogen bonding interactions and conformations due to its ability to form hydrogen bonds with other molecules.
Formula:C9H8N2OPurezza:Min. 95%Peso molecolare:160.18 g/mol(2R,3S)-4-[(tert-Butoxy)carbonyl]-2-methylmorpholine-3-carboxylic acid
CAS:Versatile small molecule scaffold
Formula:C11H19NO5Purezza:Min. 95%Peso molecolare:245.27 g/mol(3R)-3-Amino-3-phenylpropanenitrile, trifluoroacetic acid
CAS:Versatile small molecule scaffold
Formula:C11H11F3N2O2Purezza:Min. 95%Peso molecolare:260.21 g/mol(1R)-1-(1H-Imidazol-2-yl)ethan-1-amine dihydrochloride
CAS:Versatile small molecule scaffold
Formula:C5H11Cl2N3Purezza:Min. 95%Peso molecolare:184.06 g/molrac-[(2R,5S)-5-Phenyloxolan-2-yl]methanamine hydrochloride
CAS:Versatile small molecule scaffold
Formula:C11H16ClNOPurezza:Min. 95%Peso molecolare:213.7 g/mol2-Azido-1-(piperidin-1-yl)ethan-1-one
CAS:Versatile small molecule scaffold
Formula:C7H12N4OPurezza:Min. 95%Peso molecolare:168.2 g/molMethyl 4-amino-2-methylbutanoate hydrochloride
CAS:Versatile small molecule scaffoldFormula:C6H14ClNO2Purezza:Min. 95%Peso molecolare:167.63 g/mol2,2,2-Trifluoroethyl N-(3-phenyl-1,2,4-thiadiazol-5-yl)carbamate
CAS:Versatile small molecule scaffold
Formula:C11H8F3N3O2SPurezza:Min. 95%Peso molecolare:303.26 g/mol2-(3-Bromo-5-fluorophenyl)ethanol
CAS:Versatile small molecule scaffold
Formula:C8H8BrFOPurezza:Min. 95%Peso molecolare:219.05 g/mol3-[4-(1,3-Dioxolan-2-yl)oxan-4-yl]propan-1-amine
CAS:Versatile small molecule scaffoldFormula:C11H21NO3Purezza:Min. 95%Peso molecolare:215.29 g/molCyclopropyl(2,4-difluorophenyl)methanamine hydrochloride
CAS:Versatile small molecule scaffold
Formula:C10H12ClF2NPurezza:Min. 95%Peso molecolare:219.66 g/mol(2E)-3-(1-benzofuran-2-yl)prop-2-enoic acid
CAS:(2E)-3-(1-benzofuran-2-yl)prop-2-enoic acid is a white solid that has the chemical formula CHClO. It is soluble in chloroform, ether, and benzene. When heated to 105°C in the presence of air, it decomposes to release oxygen and carbon dioxide. (2E)-3-(1-benzofuran-2-yl)prop-2-enoic acid is used as an intermediate for organic synthesis reactions such as alkylation reactions and Friedel - Crafts reactions. Thermal analysis of this compound indicates that it has a high thermal stability with respect to thermal decomposition. (2E)-3-(1-benzofuran-2-yl)prop-2-enoic acid can be reacted with azide or diphenyl ether to form a coordination complex. This compound also reacts with potassium or phosphorus oxychloride to form oxychlorides.Formula:C11H8O3Purezza:Min. 95%Peso molecolare:188.18 g/mol2-Amino-3-fluoro-6-methoxybenzoic acid
CAS:Versatile small molecule scaffoldFormula:C8H8FNO3Purezza:Min. 95%Peso molecolare:185.15 g/mol7-Bromo-1H-1,2,3-benzotriazole-5-carboxylic acid
CAS:Versatile small molecule scaffoldFormula:C7H4BrN3O2Purezza:Min. 95%Peso molecolare:242.03 g/mol4-(3-Aminophenyl)-1-methyl-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid
CAS:Versatile small molecule scaffoldFormula:C14H12N4O2Purezza:Min. 95%Peso molecolare:268.27 g/mol1-Propylpyrazole
CAS:1-Propylpyrazole is a non-classical inhibitor of aldehyde oxidase that has been shown to have an inhibitory effect on pentane. 1-Propylpyrazole has peroxidase-like activity, which means it can bind to lipid hydroperoxides in the presence of hydrogen peroxide or peroxidase. It has also been shown to be an effective inhibitor of dehydrogenase, which is an enzyme that catalyzes the oxidation of aldehydes and ketones to carboxylic acids. This drug is not active against classical aldehyde oxidases such as alcohol dehydrogenase, but it does inhibit polyunsaturated fatty acid synthesis by binding with cytochrome P450 enzymes.
Formula:C6H10N2Purezza:Min. 95%Peso molecolare:110.16 g/mol(1-Methyl-1H-pyrazol-5-yl)(phenyl)methanol
CAS:Versatile small molecule scaffold
Formula:C11H12N2OPurezza:Min. 95%Peso molecolare:188.23 g/mol5,6,7,8-Tetrahydroquinolin-2(1H)-one
CAS:Tetrahydroquinolin-2(1H)-one is a hydrobromide that has been found in the environment as an environmental pollutant. Tetrahydroquinolin-2(1H)-one is used to synthesize amides and has been studied by single-crystal x-ray diffraction. The molecule is centrosymmetric, with a molecular weight of 244.06 g/mol. Tetrahydroquinolin-2(1H)-one can be used as a ligand for metals such as chlorine and magnesium. It does not dissolve in water but does dissolve in organic solvents such as ethers, chloroform, or benzene.
Formula:C9H11NOPurezza:Min. 95%Peso molecolare:149.19 g/mol[1-(2-Methoxyethyl)-3,5-dimethyl-1H-pyrazol-4-yl]methanamine
CAS:Versatile small molecule scaffold
Formula:C9H17N3OPurezza:Min. 95%Peso molecolare:183.25 g/molVinyltributyltin
CAS:Prodotto controllatoVinyltributyltin is a dibutyltin oxide (DBTO) enantiomer that has been shown to inhibit the HIV-1 protease. Vinyltributyltin has also been shown to reduce inflammation in bowel disease, as well as to have synergistic effects with other drugs in the treatment of cancer and inflammatory bowel disease. The mechanism of action of vinyltributyltin is not yet known, but it may be related to its ability to inhibit the quinazolone-dependent formation of reactive oxygen species. Vinyltributyltin also inhibits the NS3 protease, which is an enzyme involved in hepatitis C virus replication.
Formula:C14H30SnPurezza:Min. 95%Colore e forma:Colorless Clear LiquidPeso molecolare:317.1 g/molMethyl 2-methylideneoctanoate
CAS:Versatile small molecule scaffold
Formula:C10H18O2Purezza:Min. 95%Peso molecolare:170.25 g/mol2-(bromomethyl)-3-chloropyridine
CAS:Versatile small molecule scaffold
Formula:C6H5BrClNPurezza:Min. 95%Peso molecolare:206.47 g/mol3-(2-Bromophenoxy)propan-1-ol
CAS:Versatile small molecule scaffold
Formula:C9H11BrO2Purezza:Min. 95%Peso molecolare:231.09 g/molN-Methylpiperidine-4-carboxamide
CAS:Versatile small molecule scaffold
Formula:C7H14N2OPurezza:Min. 95%Peso molecolare:142.2 g/mol1-Chloro-4-isocyanobenzene
CAS:1-Chloro-4-isocyanobenzene (1CI) is an organic compound that has been used as a chemical probe for the detection of amines and other molecules on metal surfaces. The frequency shift in Raman spectra, which is observed after the addition of 1CI to the metal surface, is used to detect amines. 1CI has also been shown to be a potent inhibitor of mitochondrial function. This molecule binds to nucleophilic sites on metal surfaces and forms covalent bonds with them, leading to a high degree of inhibition.
1CI can be synthesized in three steps from commercially available starting materials and is relatively easy to purify.Formula:C7H4ClNPurezza:Min. 95%Peso molecolare:137.56 g/mol2-Amino-2-propylpentanenitrile
CAS:Versatile small molecule scaffold
Formula:C8H16N2Purezza:Min. 95%Peso molecolare:140.23 g/mol4-(2-Aminoethyl)-2-methoxyaniline
CAS:Prodotto controllatoVersatile small molecule scaffold
Formula:C9H14N2OPurezza:Min. 95%Peso molecolare:166.22 g/mol2-[3-(Propan-2-yl)phenoxy]acetic acid
CAS:2-[3-(Propan-2-yl)phenoxy]acetic acid is a chemical compound that is used as an additive in benzene, and is a phytotoxic chemical. It prevents the formation of chlorophyll by blocking electron transport and inhibiting photosynthesis. 2-[3-(Propan-2-yl)phenoxy]acetic acid is used to induce callus tissue from lettuce, radish, and other plants. This compound also inhibits the growth of various bacteria including Escherichia coli and Pseudomonas aeruginosa.
Formula:C11H14O3Purezza:Min. 95%Peso molecolare:194.23 g/mol2-Bromo-6-methylnicotinonitrile
CAS:2-Bromo-6-methylnicotinonitrile is a reactive heterocyclic compound that has been used as a palladium catalyst. It undergoes substitution reactions with halides and polyhalogenated compounds. The yield of this reaction depends on the substituents and functional groups present. 2-Bromo-6-methylnicotinonitrile can also be used to form alkynes, alkynes, and heterocycles.
2-Bromo-6-methylnicotinonitrile is an alkyne that has two functional groups: a nitrile group and a bromine group. It reacts with nucleophiles such as ammonia or amines to form the corresponding amide or amine in good yields.Formula:C7H5BrN2Purezza:Min. 95%Peso molecolare:197.03 g/mol1,2-Benzoxazol-3-ylmethanamine
CAS:Versatile small molecule scaffold
Formula:C8H8N2OPurezza:Min. 95%Peso molecolare:148.16 g/mol3-Methyl-4-sulfamoylbenzoic acid
CAS:Versatile small molecule scaffold
Formula:C8H9NO4SPurezza:Min. 95%Peso molecolare:215.23 g/mol6-Methoxy-1H-indole-2-carbaldehyde
CAS:Versatile small molecule scaffold
Formula:C10H9NO2Purezza:Min. 95%Peso molecolare:175.18 g/molIsoindolin-4-amine dihydrochloride
CAS:Versatile small molecule scaffold
Formula:C8H10N2HClPurezza:Min. 95%Peso molecolare:207.1 g/mol2-(Phenylsulfanyl)propanoic acid
CAS:Versatile small molecule scaffold
Formula:C9H10O2SPurezza:Min. 95%Peso molecolare:182.24 g/mol1-(2-Isothiocyanatoethyl)-4-methoxybenzene
CAS:Versatile small molecule scaffold
Formula:C10H11NOSPurezza:Min. 95%Peso molecolare:193.27 g/mol2-Methyl-3-oxo-pentanoicacid methyl ester
CAS:The synthesis of 2-methyl-3-oxo-pentanoic acid methyl ester is accomplished by a three step process. The first step is the intramolecular condensation of 2,2-dimethylpropionic acid with acetone to form a 1:1 mixture of 3,4-dihydroxybutyl and 4,4-dihydroxybutyl esters. The second step is the selective transesterification of the 3,4-dihydroxybutyl ester with benzaldehyde. This reaction provides an optically pure 2-methyl-3-oxo-pentanoic acid methyl ester as the major product. The third step is an aldol condensation between the ketone from the second step and acetone to produce another optically pure 2,2 dimethylpropionic acid methyl ester.Formula:C7H12O3Purezza:Min. 95%Peso molecolare:144.17 g/mol(2-Chloroethoxy)(2-chloroethyl)phosphinic acid
CAS:Versatile small molecule scaffold
Formula:C4H8Cl2O3PPurezza:Min. 95%Peso molecolare:205.98 g/mol2,2,2-Trifluoroethoxybenzene
CAS:2,2,2-Trifluoroethoxybenzene is an acid catalyst that is used in the production of chlorobenzene. This organic compound has been shown to produce a number of products when heated with dihydroxybenzene. These products include acid chlorides and benzoyl chloride that can be used as intermediates in other chemical reactions. 2,2,2-Trifluoroethoxybenzene has also been shown to react with alkali metals to produce inorganic acids. In addition to acting as an acid catalyst, this compound may be used in the synthesis of flecainide, which is an antiarrhythmic drug. This product also reacts with carbonyl groups and acidic molecules such as halogens to form alkali metal carboxylates and alkanes.
Formula:C8H7F3OPurezza:Min. 95%Peso molecolare:176.14 g/mol4-(chloromethyl)-1-methyl-1H-imidazole hydrochloride
CAS:Prodotto controllatoVersatile small molecule scaffold
Formula:C5H8Cl2N2Purezza:Min. 95%Peso molecolare:167.03 g/mol(3-Methyl-1,2-thiazol-5-yl)methanol
CAS:Versatile small molecule scaffold
Formula:C5H7NOSPurezza:Min. 95%Peso molecolare:129.18 g/mol2-Chloro-3,4-dihydronaphthalen-1(2H)-one
CAS:2-Chloro-3,4-dihydronaphthalen-1(2H)-one is a sulfoxide with significant antifungal activity. It has been shown to be effective against Candida albicans and other fungi, including Aspergillus niger and Mucor racemosus. It is commonly used as an electrolyte in electroluminescent devices, such as light emitting diodes (LEDs). The reaction time for the formation of 2-chloro-3,4-dihydronaphthalen-1(2H)-one from potassium sulfate is dependent on the acid catalyst used. Organic chemists have shown that the use of 2-chloro-3,4-dihydronaphthalen-1(2H)-one can inhibit leukotriene synthesis.
Formula:C10H9OClPurezza:Min. 95%Peso molecolare:180.63 g/molN-(3-Methoxyphenyl)prop-2-enamide
CAS:Versatile small molecule scaffold
Formula:C10H11NO2Purezza:Min. 95%Peso molecolare:177.2 g/molEthyl spiro[2.3]hexane-1-carboxylate
CAS:Versatile small molecule scaffold
Formula:C9H14O2Purezza:Min. 95%Peso molecolare:154.21 g/mol(5-Phenylpyrazin-2-yl)methanamine
CAS:Versatile small molecule scaffold
Formula:C11H11N3Purezza:Min. 95%Peso molecolare:185.22 g/mol4,5-Dihydro-1H-imidazol-2-amine hydrochloride
CAS:Please enquire for more information about 4,5-Dihydro-1H-imidazol-2-amine hydrochloride including the price, delivery time and more detailed product information at the technical inquiry form on this page
Formula:C3H7N3•HClPurezza:Min. 95%Peso molecolare:121.57 g/mol8-Bromo-2-methylimidazo[1,2-a]pyridine
CAS:Versatile small molecule scaffold
Formula:C8H7N2BrPurezza:Min. 95%Peso molecolare:211.05 g/mol1-Hydroxycyclopentane-1-carbonitrile
CAS:1-Hydroxycyclopentane-1-carbonitrile is a monomer that is hydrolyzed to form benzoin and cyanohydrins. It can be used in the production of scifinder as a monomer or dimerizer.
Formula:C6H9NOPurezza:Min. 95%Peso molecolare:111.14 g/moltert-Butyl (2,2-difluoro-3-hydroxypropyl)carbamate
CAS:Versatile small molecule scaffoldFormula:C10H13NO4Purezza:Min. 95%Peso molecolare:211.21 g/mol2-Bromo-3,3,3-trifluoro-1-propene
CAS:Prodotto controllato2-Bromo-3,3,3-trifluoro-1-propene is a chemical compound that has been synthesized in an asymmetric reaction. The reactant is bromopropane and the product is 2,2,2-trifluoropropene. The methylene group on the propene molecule is activated by the nucleophilic attack of a fluoride ion from hydrogen fluoride to form a cavity with a highly strained bond. The kinetic study of this reaction revealed that the activation energy for the reaction is 42 kJ/mol. Palladium-catalyzed coupling reactions are catalyzed by palladium and require nonpolar solvents such as toluene or dichloromethane. This type of reaction has been shown to be exothermic with an isolated yield of 1%.
Formula:C3H2BrF3Purezza:Min. 95%Colore e forma:Colorless PowderPeso molecolare:174.95 g/mol4-Chloro-2-hydroxy-6-methylphenylboronic acid
CAS:Versatile small molecule scaffoldFormula:C7H8BClO3Purezza:Min. 95%Peso molecolare:186.4 g/mol3-Hydroxy-5-methylpyridine
CAS:3-Hydroxy-5-methylpyridine (3HMP) is a chemical substance that has been classified as an amine. It is a product of the metabolism of purines, which are nitrogenous bases found in DNA and RNA. 3HMP is produced by aerogenic bacteria (such as Enterobacter), and can be used to estimate the number of these bacteria present in water samples. 3HMP has been shown to have antiviral properties against influenza virus, and can be used as a biomarker for the presence of other viruses in animals. 3HMP also has mineralization properties, which have been studied extensively, particularly with regards to pancreatic disease.
Formula:C6H7NOPurezza:Min. 95%Colore e forma:PowderPeso molecolare:109.13 g/molRef: 3D-FH16174
Prodotto fuori produzione4,5-Dihydroxy-2,3-Pentanedione
CAS:4,5-Dihydroxy-2,3-pentanedione is a carbonyl compound that is the product of the oxidation of ascorbic acid. It is used in wastewater treatment and has antimicrobial properties against infectious diseases. This compound has been shown to inhibit protein synthesis by binding to the ribosome and preventing the formation of peptide bonds between amino acids. 4,5-Dihydroxy-2,3-pentanedione has also been shown to bind to plasma proteins, which may be due to its acyl chain structure. 4,5-Dihydroxy-2,3-pentanedione can be synthesized in a catalytic mechanism that involves dehydroascorbic acid and molecular oxygen.
Formula:C5H8O4Purezza:Min. 95%Colore e forma:PowderPeso molecolare:132.11 g/molRef: 3D-FD180770
Prodotto fuori produzionePiperyline
CAS:Piperyline is an alkanoic acid that has shown to be effective against skin cancer. It also has antimicrobial properties, which may be due to its ability to bind metal ions and form polymeric compounds. Piperyline inhibits microbial growth by inhibiting the synthesis of proteins and nucleic acids. The antimicrobial activity is related to its cationic polymerization with hydroxyl groups, which forms a structure that can inhibit microbial enzymes and disrupt microbial cell membranes. This compound also interacts with the skin's natural lipids, making it difficult for microorganisms to attach and grow on the skin. Piperyline is synthesized in organic chemistry laboratories as an amide precursor of other pharmaceuticals such as penicillin.
Formula:C16H17NO3Purezza:Min. 95%Peso molecolare:271.31 g/mol
