(3aR,3bS,7aR,8aR)-2,2-Dimethyl-3a,5,7a,8a-tetrahydro-3bH-1,3,8-trioxa-4-aza-cyclopenta[a]indene-4-carboxylic acid benzyl ester

(3R,3aS,6R,7R,7aS)-6,7-Bis-benzyloxy-2,3-dihydroxy-hexahydro-furo[3,2-b]pyridine-4-carboxylic acid benzyl ester

3-amino-N-benzyloxycarbonyl-3-deoxy-1,2-O-isopropylidene-α-D-xylofuranose

Allyl-((3aR,5R,6R,6aR)-2,2-dimethyl-5-vinyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl)-carbamic acid benzyl ester

(3aR,3bR,6R,7R,7aS,8aR)-6,7-Dihydroxy-2,2-dimethyl-hexahydro-1,3,8-trioxa-4-aza-cyclopenta[a]indene-4-carboxylic acid benzyl ester