methyl 2-S-benzyl-4,6-O-benzylidene-3-benzylsulfonamido-3-deoxy-2-thio-α-D-altropyranoside

methyl 3-S-benzyl-4,6-O-benzylidene-2-benzylsulfonamido-2-deoxy-3-thio-α-D-glucopyranoside