(2S)-2-[(2S)-6-amino-2-[(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-[(2S)-6-amino-2-[(2-aminophenyl)formamido]hexanamido]-4-methylpentanamido]-3-(benzyloxy)propanamido]-3-phenylpropanamido]-3-hydroxypropanamido]hexanamido]-N-{2-[(2,4-dinitrophenyl)amino]ethyl}pentanediamide