3-[6-(1,1-copperdichloro-1H,2H,3H,4H-pyrido[1,2-c]pyrimidin-9-ium-2-yl)-8a-methoxy-5-methyl-4,7-dioxo-(8aR)-1,1a,2,4,7,8,8a,8b-octahydroazireno[3',2':3,4]pyrrolo[1,2-a]indol-8-yl]methyloxocarboxamide