2(1H)-Quinolinone, 3,4-dihydro- (9CI) 2-Oxo-1,2,3,4-tetrahydroquinoline 3,4-Dihydro-2-quinolinol 3,4-Dihydrocarbostyril 553-03-7 Carbostyril, 3,4-dihydro- (VAN) (8CI) Hydrocarbostyril NSC 49170 o-Aminohydrocinnamic acid lactam