1-Butyl-4-[3-(3-ethyl-1,3-benzoselenazol-2(3H)-ylidene)prop-1-en-1-yl]quinolinium iodide;quinolinium, 1-butyl-4-[3-(3-ethyl-2(3H)-benzoselenazolylidene)-1-propen-1-yl]-, iodide (1:1)
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