134049-71-1 3,5-Dihydro-3,5-dibutyl-4H-imidazo(4,5-c)quinolin-4-one monohydrochloride 3,5-n-Di-n-Butyl-3H,5H-imidazo(4,5-c)quinolin-4-one hydrochloride 4H-Imidazo(4,5-c)quinolin-4-one, 3,5-dihydro-3,5-dibutyl-, monohydrochloride