10a,11a-dihydroxy-11-methoxy-6,6,17,17,18-pentamethyl-11,11a,17,18-tetrahydro-5h-azeto[1,2-a]indolo[3''',2''':4'',5'']azocino[1'',2'':4',5']pyrazino[1',2':1,5]pyrrolo[2,3-b]indole-10,20(6h,10ah)-dione