Description_x000D_ Packaging_x000D_ 5, 25 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ 2′-C-Methylcytidine is a potent inhibitor of the HCV NS5B RNA polymerase. 2′-C-Methylcytidine was the first nucleoside NS5B inhibitor that showed clinical efficacy. 2′-C-Methylcytidine was found to be effective against the 17D vaccine strain of yellow fever virus YFV in cell culture.