1,2,3,3a,4,5-Hexahydro-6H-indol(3,2,1-de)(1,5)naphthyridin-6-one 1,2,3,3a,4,5-Hexahydrocanthin-6-one 26400-25-9 6H-Indolo(3,2,1-de)(1,5)naphthyridin-6-one, 1,2,3,3a,4,5-hexahydro-