134049-67-5 3,5-Dihydro-5-butyl-3-methyl-4H-imidazo(4,5-c)quinolin-4-one 4H-Imidazo(4,5-c)quinolin-4-one, 3,5-dihydro-5-butyl-3-methyl- 5-n-Butyl-3-methyl-3H,5H-imidazo(4,5-c)quinolin-4-one