1 9Z1 (3e,7ar,12as)-6-hydroxy-3-[(1h-imidazol-4-yl)methylidene]-12-methoxy-7a-(2-methylbut-3-en-2-yl)-7a,12-dihydro-1h,5h-imidazo[1',2':1,2]pyrido[2,3-B]indole-2,5(3h)-dione 1.000 2 9Z7 (3e,7ar,12as)-3-[(1h-imidazol-4-yl)methylidene]-6,12-dimethoxy-7a-(2-methylbut-3-en-2-yl)-7a,12-dihydro-1h,5h-imidazo[1 ',2':1,2]pyrido[2,3-B]indole-2,5(3h)-dione 0.912