(E)-(4R,5S)-4-Benzyloxy-5-[(S)-3-(tert-butyl-dimethyl-silanyloxy)-butyryloxy]-hex-2-enoic acid (E)-(1S,2R)-2-benzyloxy-4-methoxycarbonyl-1-methyl-but-3-enyl ester

methyl 3-oxo-5(S)-<(tert-butyldimethylsilyl)oxy>hexanoate

(Z)-(S)-2-((R)-2-Benzyloxycarbonylamino-2-tert-butoxycarbonyl-ethylsulfanyl)-5-(tert-butyl-dimethyl-silanyloxy)-hex-2-enoic acid methyl ester

(S)-2-((R)-2-Benzyloxycarbonylamino-2-tert-butoxycarbonyl-ethylsulfanyl)-5-(tert-butyl-dimethyl-silanyloxy)-3-hydroxy-hexanoic acid methyl ester