tert-butyl (2S,3R)-3-[({(1S)-5-{[(benzyloxy)carbonyl]amino}-1-[(methylamino)carbonyl]pentyl}amino)carbonyl]-2-(3-hydroxypropyl)-5-methylhexanoate

(4S,5R)-5-[({(1S)-5-amino-1-[(methylamino)carbonyl]pentyl}amino)carbonyl]-4-(tert-butoxycarbonyl)-7-methyloctanoic acid