3'-O-tert-butyldimethylsilyl-2',5'-dideoxy-5'-oxothymidine
3'-o-tert-butyldimethylsilyl-2',5'-dideoxy-5'-oxothymidine
3'-O-tert-butyldimethylsilyl-2',5'-dideoxy-5'-oxothymidine
3'-o-tert-butyldimethylsilyl-2',5'-dideoxy-5'-oxothymidine