Chemical Name: β-D-N4-hydroxycytidine-5'-isopropyl ester
Biological ActivityMolnupiravir is a broad-spectrum antiviral prodrug of the nucleoside analog β-D-N4-hydroxycytidine (NHC). Molnupiravir competes predominantly with CTP for incorporation; it induces lethal viral mutagenesis by increasing G to A and C to U transition mutations without inhibition of RNA synthesis in replicating coronaviruses, which prevents the development of viral resistance. In primary airway epithelial cell cultures, Molnupiravir dose-dependently inhibits SARS-CoV-2 infectious virus production; it also inhibits MERS-CoV and SARS-CoV with EC50 values in the submicromolar range. In mice infected with SARS-CoV or MERS-CoV, Molnupiravir improves pulmonary function, and reduces virus titer and body weight loss. Molnupiravir also displays in vivo efficacy against seasonal and pandemic influenza A shed virus. It is orally bioavailable.
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An orally bioavailable broad-spectrum antiviral inhibits SARS-CoV-2 in human airway epithelial cell cultures and multiple coronaviruses in mice.
Sheahan et al.
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