(2R,4R,5R)-4-((tert-butyldimethylsilyl)oxy)-2-(((tert-butyldimethylsilyl)oxy)methyl)-3-hydroxy-5-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-3-carbonitrile

O-((2R,3R,4S,5S)-5-(((tert-butyldimethylsilyl)oxy)methyl)-4-cyano-2-(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-3-yl) O-phenyl carbonothioate