(2R)-2-{[(2R,5R,8R,11R,14R,17S)-17-({[(6R,9R,12R,15R,18R,21R,24S)-24-(acetylamino)-1-amino-12,15,18-tris(3-{[amino(azanylidene)methyl]amino}propyl)-1-azanylidene-6-carbamoyl-9,21-dimethyl-8,11,14,17,20,23-hexaoxo-2,7,10,13,16,19,22-heptazapentacos-25-yl]disulfanyl}methyl)-5,8,11-tris(3-{[amino(azanylidene)methyl]amino}propyl)-2,14-dimethyl-1,4,7,10,13,16,19-heptaoxo-3,6,9,12,15,18-hexazaicos-1-yl]amino}-5-{[amino(azanylidene)methyl]amino}pentanamide acetic acid