1,5-Dihydro-5-butyl-1,9-dimethyl-4H-imidazo(4,5-c)quinolin-4-one monohydrochloride 133306-18-0 4H-Imidazo(4,5-c)quinolin-4-one, 1,5-dihydro-5-butyl-1,9-dimethyl-, monohydrochloride 5-n-Butyl-1,9-dimethyl-1H,5H-imidazo(4,5-c)quinolin-4-one hydrochloride