(6S,9S,12R,15S,18S)-18-{[(3S,6S)-3-(1H-imidazol-4-ylmethyl)-6-(1H-indol-3-ylmethyl)-1,4,7-trioxo-1-[(2S)-5-oxopyrrolidin-2-yl]-2,5-diazahept-7-yl]amino}-6-{[(2S)-2-[(ethylamino)carbonyl]pyrrolidin-1-yl]carbonyl}-1-amino-1-azanylidene-15-[(4-hydroxyphenyl)methyl]-9,12-bis(2-methylpropyl)-8,11,14,17-tetraoxo-2,7,10,13,16-pentazanonadecan-19-yl [(2-hydroxyacetyl)oxy]acetate