(1R,3R)-acetic acid 3-benzyloxycarbonylamino-1-carbamoyl-4-methylpentyl ester

[(1R,3S)-1-Benzyl-4-(tert-butyl-diphenyl-silanyloxy)-3-methyl-butyl]-carbamic acid tert-butyl ester

(4S)-4-N-tert-butoxycarbonylamino-5-phenyl-2-methyl-2-trans-pentenoic acid, ethyl ester

[L-(trans)]-4-[(t-butoxycarbonyl)amino]-2-methyl-5-phenyl-2-pentenoic acid

(4S)-4-benzyloxycarbonylamino-5-methylhex-2-enoic acid methyl ester