6-(hydroxymethyl)-15-{[3-(1H-indol-3-yl)-2-[({1-[(5-oxotetrahydro-1H-pyrrol-2-yl)carbonyl]tetrahydro-1H-pyrrol-2-yl}carbonyl)amino]propanoyl]amino}-5,8,11,14-tetraoxo-12-(prop-2-yl)-4,7,10,13,16-pentazatricyclo[14.6.1.017,22]tricosa-1(23),17(18),19,21-tetraene-3-carboxylic acid