Brexpiprazole(OPC34712);7-{4-[4-(1-Benzothiophen-4-yl)piperazin-1-yl]butoxy}quinolin-2(1H)-one;Brexpiprazole;OPC-34712;7-[4-(4-benzo[b]thien-4-yl-1-piperazinyl)butoxy]- 2(1H)-Quinolinone;7-[4-[4-(1-Benzothiophen-4-yl)piperazin-1-yl]butoxy]-1H-quinolin-2-one;7-(4-(4-(Benzo[b]thiophen-4-yl)piperazin-1-yl)butoxy)quinolin-2(1H)-one;Brexpiprazole impurity a