N,N'-bis(carbobenzyloxy)-L-cystine di-tert-butyl ester

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

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

N-(carbobenzyloxy)-S-phthalimido-L-cysteine tert-butyl ester

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