antineoplastic; chemical formula: cyclo(Cys4-16,6-14) acetyl-Ala-Gly-Ser-Cys-Tyr-Cys-Ser-Gly-Pro-Pro-Arg-Phe-Glu-Cys-Trp-Cys-Tyr-Glu-Thr-Glu-Gly-Thr-Gly-Gly-Gly-Lys-(2-[(1E,3E,5E)−5-[1-(5-carboxypentyl)−1,3-dihydro-3,3-dimethyl-5-sulfo-2H-indol-2-ylidene]-1,3-pentadien-1-yl]-3-methyl-5-sulfo-1,3-bis(4-sulfobutyl)−3H-indolium)-amide ammonium acetate salt
