134049-72-2 3,5-Dihydro-5-butyl-3-(2-oxopropyl)-4H-imidazo(4,5-c)quinolin-4-one 3-Acetonyl-5-n-butyl-3H,5H-imidazo(4,5-c)quinolin-4-one 4H-Imidazo(4,5-c)quinolin-4-one, 3,5-dihydro-5-butyl-3-(2-oxopropyl)-