1,2,3,4,8,9,10,12-Octahydro(2,1-b)pyrido(2,3-f)quinazolin-9-one 91599-59-6 DM 9278 DM-9278 Imidazo(2,1-b)pyrido(2,3-f)quinazolin-9(10H)-one, 1,2,3,4,7,12-hexahydro-