benzyl 2-amino-(R)-4,6-O-benzylidene-2-deoxy-2-N-3-O-methylidene-2-N-(trans-2-pentenoyl)-β-D-allopyranoside

benzyl 2-amino-(R)-4,6-O-benzylidene-2-N-(trans-2-butenoyl)-2-deoxy-2-N-3-O-isopropylidene-β-D-allopyranoside

benzyl 2-acetamido-4,6-O-benzylidene-2-deoxy-2-N-3-O-isopropylidene-β-D-allopyranoside