3-(4-thiazolyl)-DL-alanine dihydrochloride
(3S,4S)-4-(N-tert-butoxycarbonyl)amino-5-cyclohexyl-3-hydroxy-N-(2-morpholinoethyl)pentanamide
(4S)-40<(tertibutyloxycarbonyl)amino>-3-oxo-5-phenylpentanoic acid ethyl ester
(3S,4S)-4-(N-tert-butoxycarbonyl)amino-3-hydroxy-5-phenylpentanoic acid ethyl ester
(3S,4S)-4-(N-tert-butoxycarbonyl)amino-5-cyclohexyl-3-hydroxypentanoic acid