methyl 2-benzyloxycarbonylamino-2,3,4,7-tetradeoxy-α-D-ribo-heptopyranoside

methyl 2,3,4-trideoxy-2-phthalimido-6-O-trityl-α-D-glucopyranoside

methyl 2,6-bis(benzyloxycarbonylamino)-2,3,4,6,7-pentadeoxy-α-D-ribo-heptopyranoside