(S)-9-[(S)-1-(2-Azido-benzoyl)-2,5-dioxo-2,3,4,5-tetrahydro-1H-benzo[e][1,4]diazepin-3-ylmethyl]-2-isobutyl-3-oxo-2,3-dihydro-imidazo[1,2-a]indole-1-carboxylic acid benzyl ester

(S)-2-Isobutyl-3-oxo-9-{(S)-2-phenoxycarbonyl-2-[2-(2,2,2-trichloro-ethoxycarbonylamino)-benzoylamino]-ethyl}-2,3-dihydro-imidazo[1,2-a]indole-1-carboxylic acid benzyl ester