879551-01-6

2-C-Methyl-4,5-O-(1-methylethylidene)-D-arabinonic Acid?Ethyl Ester Cyclic Sulfate?can be?utilized for the synthesis of2''-deoxy-2''-fluoro-2''-C-methylcytidine (I) (PSI-6130), which is a potent and selective inhibitor of HCV NS5B polymerase. It also has potential applications for the synthesis of related antiviral agents.