(7-(4-{4-[4-(2,3-dichlorophenyl)piperazin-1-yl]butoxy}butoxy)-3,4-dihydroquinolin-2(1H)-one) is an impurity of Aripiprazole (A771000), a selective dopamine D2-receptor antagonist with dopamine autoreceptor agonist activity. Aripiprazole USP Related Compound H.
