7-Amino-3-beta-D-ribofuranosyl-1H-pyrazolo[4,3-d]pyrimidine monohydrate

Formycin (Formycin A) is isolated from Nocardia interforma and from Streptomyces lavendulae , . The antibiotic is effective against Xanthomonas oryzae and Pellicularia filamentosa. Its activity against Yoshida rat sarcoma cell is enhanced by coformycin. Formycin B inhibits Xanthomonas oryzae and interferes with multiplication of influenza A virus in the cells of chick chorioallantoic membrane . Oxoformycin B shows no activity against Xanthomonas oryzae .

Formycin A (NSC 102811), a purine nucleoside antibiotic, is a potent human immunodeficiency virus type 1 (HIV-1) inhibitor with an EC50 of 10 μM. Formycin A shows antitumor and antiviral activities[1][2].

ChEBI: Formycin A is a formycin. It has a role as an antineoplastic agent.

HIV-1: 10 μM (EC₅₀)

[1] Dapp MJ , et al. Discovery of novel ribonucleoside analogs with activity against human immunodeficiency virus type 1.J Virol. 2014 Jan;88(1):354-63. DOI:10.1128/JVI.02444-13
[2] Zhang M, et al. Comparative Investigation into Formycin A and Pyrazofurin A Biosynthesis Reveals Branch Pathways for the Construction of C-Nucleoside Scaffolds. Appl Environ Microbiol. 2020 Jan 7;86(2). DOI:10.1128/AEM.01971-19