139339-11-0 3,5-Dihydro-5-phenyl-3-(phenylmethyl)-4H-imidazo(4,5-c)(1,8)naphthyridin-4-one 4H-Imidazo(4,5-c)(1,8)naphthyridin-4-one, 3,5-dihydro-5-phenyl-3-(phenylmethyl)- KF 18280 KF18280