Synthesis and HCV inhibitory properties of 9-deaza- and 7,9-dideaza-7-oxa-2′-C-methyladenosine - Butora, Gabor; Olsen, David B.; Carroll, Steven S.; McMasters, Daniel R.; Schmitt, Christoph; Leone, Joseph F.; Stahlhut, Mark; Burlein, Christine; MacCoss, Malcolm (Bioorganic & Medicinal Chemistry, 2007)