Aripiprazole Impurity 21

Chemical Name: 1-Hydroxy-3,4-dihydroquinolin-2(1H)-one; 3,4-Dihydro-1-hydroxy-carbostyril; 3,4-Dihydro-1-hydroxy-2(1H)-quinolinone; N-Hydroxy-2-oxo-1,2,3,4-tetrahydroquinoline;