139482-29-4 3,5-Dihydro-5-butyl-3-methyl-4H-imidazo(4,5-c)(1,8)naphthyridin-4-one 4H-Imidazo(4,5-c)(1,8)naphthyridin-4-one, 3,5-dihydro-5-butyl-3-methyl- 5-Butyl-3-methyl-3H-imidazo(4,5-c)(1,8)naphthyridin-4(5H)-one