5-Acetyl-8-hydroxyquinolin-2(1H)-one1-(1,2-Dihydro-8-hydroxy-2-oxoquinolin-5-yl)ethan-1-one5-Acetyl-1,2-dihydro-8-hydroxy-2-oxoquinoline5-acetyl-8-hydroxy-1,2-dihydroquinolin-2-one5-Acetyl-8-hydroxycarbostyril5-Acetyl-8-hydroxy-1H-quinolin-2-one5-Acetylquinoline-2,8-diol5-Acetyl-8-hydroxy-2(1H)-quinolinone