138297-15-1 [23-(acetylamino)-26-(2-amino-2-oxoethyl)-18-carbamoyl-3,15-bis{3-[(diaminomethylidene)amino]propyl}-12-(4-methoxybenzyl)-1,4,7,10,13,16,24,27-octaoxooctacosahydro-1H-pyrrolo[2,1-v][1,2,5,8,11,14,17,20,23,26]dithiaoctaazacyclononacosin-9-yl]acetic acid