benzyl ((S)-6-amino-1-(((S)-1-(((S)-1,6-diamino-1-oxohexan-2-yl)amino)-1-oxo-3-phenylpropan-2-yl)amino)-1-oxohexan-2-yl)carbamate

caboxybenzyl-Phe-Lys-acyloxymethylketone

(5S,8S,11S)-5,11-bis(4-aminobutyl)-8-benzyl-3,6,9,12-tetraoxo-1-phenyl-2-oxa-4,7,10-triazatridecan-13-yl 2,6-dimethylbenzoate