1,3-Dimethyl-4-ethylcarbostyril 15112-97-7 2(1H)-Quinolinone, 1,3-dimethyl-4-ethyl- CARBOSTYRIL, 1,3-DIMETHYL-4-ETHYL- Carbostyril, 4-ethyl-1,3-dimethyl- (8CI) NSC 142458