11-Chloro-1,2,3,3a,4,5-hexahydro-6H-indolo(3,2,1-de)(1,5)naphthyridin-6-one 65285-74-7 6H-Indolo(3,2,1-de)(1,5)naphthyridin-6-one, 1,2,3,3a,4,5-hexahydro-11-chloro-