7-​[4-​(4-​Benzo[b]​thien-​4-​yl-​1-​piperazinyl)​butoxy]​-​1-​[4-​[(1,​2,​3,​4-​tetrahydro-​2-​oxo-​7-​quinolinyl)​oxy]​butyl]​-2(1H)​-​quinolinone