3-[(4R,7S,10S,13S,16S,19R)-19-amino-13-[(2S)-but-2-yl]-7-(carboxymethyl)-16-[(4-hydroxyphenyl)methyl]-4-{[(2S)-2-[(3S)-6-carbamoyl-3-(2-methylpropyl)-1,4-dioxo-2,5-diazahex-1-yl]tetrahydro-1H-pyrrol-1-yl]carbonyl}-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentazacycloicosan-10-yl]propanoic acid 2,2,2-trifluoroacetic acid