[((3aR,5R,6S,6aR)-6-Azido-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-ylmethyl)-benzyloxycarbonyl-amino]-acetic acid methyl ester

2-[((3aR,5R,6S,6aR)-6-Azido-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-ylmethyl)-benzyloxycarbonyl-amino]-3-phenyl-propionic acid methyl ester

3-azido-3-deoxy-1,2-O-isopropylidene-α-D-ribofuranose