2,5-dioxopyrrolidin-1-yl (2S)-2-(((benzyloxy)carbonyl)amino)-3-methylbutanoate
(S)-2-[(S)-2-((2S,3S)-2-Amino-3-methyl-pentanoylamino)-4-methyl-pentanoylamino]-3-phenyl-propionic acid
Leu-Phe-OH
N-Z-L-isoleucine N-hydroxysuccinimide ester
Z-Ile-Leu-Phe-OH