4-(benzyloxycarbonyl-O-benzyl-L-tyrosyl)aminobutyryl-L-phenylalanyl-L-leucine
(S)-Leu-OMe
methyl (S)-2-((S)-2-(tert-butoxycarbonylamino)-3-phenylpropanamido)-4-methylpentanoate
N-Boc-γ-aminobutyryl-L-phenylalanyl-L-leucine methyl ester
N-benzyloxycarbonyl-O-benzyl-L-tyrosine