1-(6-(4-(6-(2,6-dimethyl-4-(3-methyl-2,3-dihydro-1,3-benzothiazol-2-ylidenmethyl)-1-pyridiniumyl)hexanoyl)piperazino)-6-oxohexyl)-2,6-dimethyl-4-(3-ethyl-2,3-dihydro-1,3-benzothiazol-2-ylidenmethyl)pyridinium