139482-15-8 3,5-Dihydro-3-(2-oxopropyl)-5-phenyl-4H-imidazo(4,5-c)(1,8)naphthyridin-4-one 4H-Imidazo(4,5-c)(1,8)naphthyridin-4-one, 3,5-dihydro-3-(2-oxopropyl)-5-phenyl-