1,5-Dihydro-5-phenyl-1-(phenylmethyl)-4H-imidazo(4,5-c)(1,8)naphthyridin-4-one 139339-08-5 4H-Imidazo(4,5-c)(1,8)naphthyridin-4-one, 1,5-dihydro-5-phenyl-1-(phenylmethyl)-