Antimicrobials

2,4-Diacetylphloroglucinol is a natural phenol produced by certain bacteria, used for its biocontrol properties against plant pathogens.

Inhibitor of protein synthesis; aminoglycoside

Penciclovir is an antiviral agent and acyclic guanine derivative that has proven efficient in the treatment of Herpes Simplex type 1 and 2 (HSV1 and HSV2) infection. Penciclovir is transformed by the virus into an active derivative able to block the deoxyguanosine triphosphate substrate binding site of the HSV polymerase.

Nucleoside analog with antiviral activity against coronaviruses, hepatitis and influenzas viruses. EIDD 1931 inhibited the Middle East Respiratory Syndrome coronavirus (MERS-CoV) and the murine hepatitis virus (MHV) replication in vitro at submicromolar concentrations. EIDD 1931 is able to evade the proofreading exonuclease ExoN and presents with high barrier to development of drug resistance.

Inhibitor of cell-wall synthesis; carbapenem class

Ribostamycin sulphate is an aminoglycoside antibiotic with action on bacterial protein synthesis by binding to the 30S ribosomal subunit and is used for treating bacterial infections like sepsis and pneumonia.

5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate is an antibacterial compound with a broad spectrum of activity against Gram-positive and Gram-negative bacteria. It is active against strains resistant to other antibiotics, such as, tetracycline and penicillin. 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate has been shown to be effective in vitro against Campylobacter jejuni - the most common cause of bacterial gastroenteritis in humans. The compound also inhibits the growth cycle of Campylobacter jejuni by arresting the cells at the G1 phase. The molecule has been shown to inhibit DNA synthesis in E. coli and S. typhimurium with IC50 values of 1 ÎŒM and 0.8 ÎŒM respectively. This molecule has been tested for its surface active properties and it can be used as an additive in personal care products for improved wetting and spreading on surfaces. The compound is also researched for its antifungal efficacy against Candida albicans by inhibiting the growth cycle of the fungus.

Chlorotetracycline monohydrochloride is an antibiotic designed for culture media use. It is derived from the bacterium *Streptomyces aureofaciens*, and functions primarily by inhibiting bacterial protein synthesis. This action prevents the attachment of aminoacyl-tRNA to the ribosomal acceptor site, effectively halting the growth of bacteria by disrupting protein production, which is essential for their survival and replication.

Darunavir is a HIV-1 protease inhibitor used orally in the treatment of patients with multi-drug resistant HIV-1 infection (Ghosh, 2007). It has also been shown to be effective against other infectious diseases such as hepatitis C virus and SARS coronavirus. Metabolized by cytochrome P450 3A (CYP3A) isoenzymes, darunavir is often administered together with ritonavir that prolongs its bioavaiability, giving a terminal elimination half-life (t1/2) of 15 hours (Back, 2008). The effect of darunavir on natural compounds such as matrix proteins and toll-like receptor activity has also been studied via high performance liquid chromatography (HPLC) experiments.

Rupintrivir is a peptidomimetic antiviral with action on rhinovirus 3C protease to inhibit viral replication and is used for research on rhinovirus and other viral infections.

Azithromycin N-oxide is a macrolide antibiotic derivative and is used for research purposes. Its mode of action is similar to azithromycin.

Antibiotic of fluoroquinolone class; DNA replication inhibitor

Inhibitor of protein synthesis; steroid antibiotic

CCR-5 chemokine receptor antagonist; inhibits HIV entry via gp120 protein

Clotrimazole is an azole antifungal medication with action on fungal cell membrane disruption and is used for treating fungal infections like athlete's foot, ringworm, and vaginal yeast infections.