2′-C-Methylcytidine (NM107) is a potent and selective inhibitor of Chronic hepatitis C virus (HCV) NS5B polymerase with an EC50 of 1.85 μM in wild-type replicon cells. It also effectively inhibits foot-and-mouth disease virus(FMDV) replication with an EC50 of 6.4 μM. Therefore it is a potent antiviral that targets both viral and host factors, making it a promising option for HCV therapy and a potential prophylactic or therapeutic agent against FMDV outbreaks.