1,5-Dihydro-5-ethyl-1-methyl-4H-imidazo(4,5-c)quinolin-4-one 133305-96-1 4H-Imidazo(4,5-c)quinolin-4-one, 1,5-dihydro-5-ethyl-1-methyl- 5-Ethyl-1-methyl-1H,5H-imidazo(4,5-c)quinolin-4-one