6-Nitro-3,4-dihydroquinolin-2(1H)-one3,4-Dihydro-6-nitro-1H-quinolin-2-one3,4-Dihydro-6-nitrocarbostyril6-Nitro-3,4-dihydro-1H-quinolin-2-one6-Nitro-1,2,3,4-tetrahydrochinolin-2-one6-Nitro-1,3,4-trihydroquinolin-2-one3,4-Dihydro-6-nitro-2(1H)-quinolinone6-nitro-1,2,3,4-tetrahydroquinolin-2-one