Methyl 4-O-benzyl-6-O-tert-butyldiphenylsilyl-2,3-di-O-isopropylidene-α-D-mannopyranoside

ethyl (methyl 2,3-O-isopropylidene-6,7-dideoxy-4-phenylthionocarbonate-α-D-mannooctopyranosid)uronate