133305-92-7 4H-Imidazo(4,5-c)quinolin-4-one, 1,5-dihydro-5-butyl-1-methyl- 5-Butyl-1-methyl-1,5-dihydro-1H-imidazo(4,5-c)quinolin-4(5H)-one BRN 4872911 KF 15570