(2S)-氨基-n-[(1r,2r)-2-羟基-1-甲基-2-苯基乙基]-n-甲基-4-戊酰胺

(4S,5R)-4-烯丙基-5-甲氧基-1,3-恶唑烷-2-酮

tert-butyl (S)-2-[(tert-butoxycarbonyl)amino]pent-4-enoate

tert-butyl (2S)-2-[N-(9-phenylfluoren-9-yl)amino]pent-4-enoate

(2S,4'S,5'R)-2-amino-1-(3',4'-dimethyl-2'-oxo-5'-phenyl-1'-imidazolydinyl)-4-penten-1-one