5-O-acetyl-1,2-O-isopropylidene-3-O-(imidazolylthiocarbonyl)-α-D-xylofuranose

N-(benzyloxycarbonyl)-4,5-dihydroxy-D-threo-L-norvaline

5-O-acetyl-2-azido-2,3-dideoxy-D-threo-pentonic acid γ-lactone

5-O-Acetyl-3-desoxy-L-threo-pentofuranose

5-O-acetyl-2-O-<(4-chlorophenyl)sulfonyl>-3-deoxy-D-erythro-penonic acid γ-lactone

N-(benzyloxycarbonyl)-5-<<(4-chlorophenyl)sulfonyl>oxy>-4-hydroxy-D-threo-L-norvaline diphenylmethyl ester

(3S,5S)-3-benzyloxycarbonylamino-5-hydroxy-γ-lactone

5-O-acetyl-2-O-<(4-chlorophenyl)sulfonyl>-3-deoxy-β-D-erythro-pentfuranose

N-(benzyloxycarbonyl)-4,5-bis<<(4-chlorophenyl)sulfonyl>oxy>-4-D-threo-L-norvaline diphenylmethyl ester

5-O-acetyl-2-<(benzyloxycarbonyl)amino>-2,3-dideoxy-D-threo-pentonic acid γ-lactone

N-(benzyloxycarbonyl)-4,5-dihydroxy-D-threo-L-norvaline diphenylmethyl ester

5-O-acetyl-2-amino-2,3-dideoxy-D-threo-pentonic acid γ-lactone hydrochloride