2-[(3aR,4R,6aS)-4-[(tert-butyl(diphenyl)silyl)oxymethyl]-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-6-yl]acetonitrile

2-((3aS,6R,6aR)-6-((tert-butyldiphenylsilyloxy)methyl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)-3-(cyanomethylamino)acrylonitrile

(E/Z)-2-[(3aS,6R,6aR)-6-[(tert-butyl(diphenyl)silyl)oxymethyl]-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-4-yl]-2-cyanovinyl methanesulfonate

((3aR,4R,6S,6aS)-6-(4-aminopyrazolo[1,5-a][1,3,5]triazin-8-yl)-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methyl sulfamate