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1-butyl-2-(2-{3-[2-(1-butyl-1H-benzo[cd]indol-2-ylidene)ethylidene]-2-phenylcyclohex-1-en-1-yl)ethenyl)-benzo[cd]indol-1-iumtetrafluoroborate
1-butyl-2-(2-[3-[2-(1-butyl-1H-benzo[cd]indol-2-ylidene)ethylidene]-2-phenylcyclopent-1-enyl]vinyl)benzo[cd]indolium tetrafluoroborate