Obatoclax Mesylate (GX15-070) Obatoclax Mesylate (GX15-070) Synonyms: 2-[2-[(3,5-Dimethyl-1H-pyrrol-2-yl)methylene]-3-methoxy-2H-pyrrol-5-yl]-1H-indole methanesulfonate CAS NO.: 803712-79-0 Formula: C20H19N3O.CH4O3S Weight: 413.49002