5-O-acetyl-3-deoxy-1,2-O-isopropylidene-α-D-erythropentose

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

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

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

(3R,5S)-5-(benzyloxymethyl)-3-hydroxy-dihydrofuran-2(3H)-one

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

(2R,3R,5S)-2-(4-aminopyrrolo[2,1-f][1,2,4]triazin-7-yl)-3-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-carbonitrile