Benz[cd]​indol-​2(1H)​-​one, 6-​chloro-​2a-​[4-​[4-​(4-​chlorophenyl)​-​3,​6-​dihydro-​1(2H)​-​pyridinyl]​butyl]​-​2a,​3,​4,​5-​tetrahydro-​, hydrochloride (1:1)