5-((3-((tert-butoxycarbonyl)amino)propyl)amino)-5-oxopentanoic acid

(2S)-N-[2-(3,5-dioxo-1,2-diphenyl-1,2,4-triazolidin-4-yl)ethyl]-Nα-[2-(1-{2-oxo-2-[4-(6-oxo-6,11-dihydro-5H-dibenzo[b,e]azepin-11-yl)piperazin-1-yl]ethyl}cyclopentyl)acetyl]-Nω-[4-(3-propanoylaminopropyl)aminocarbonylbutanoyl]argininamide