水

硫酸

(3S)-3-((4-羟基苯基)甲基)-2,5-哌嗪二酮

leucyl=>glycyl=>-tyrosine

(2S,7'R)-3-[4-(2,6-dichlorobenzyloxy)phenyl]-2-(1-tert-butoxycarbonyl-6-oxo-1,7-diazaspiro[4.6]undec-9-en-7-yl)propionic acid methyl ester