3-[(4R,7S,10S,13S,16S,19R)-4-{[(2S)-2-[(3S)-6-carbamoyl-3-(2-methylpropyl)-1,4-dioxo-2,5-diazahex-1-yl]pyrrolidin-1-yl]carbonyl}-19-amino-13-[(2S)-but-2-yl]-7-(carbamoylmethyl)-16-[(4-hydroxy-3-nitrophenyl)methyl]-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosan-10-yl]propanamide 2,2,2-trifluoroacetic acid