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3H-Indolium,2-[3-(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)-2-[(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)methyl]-1-propenyl]-1,3,3-trimethyl-,tetrafluoroborate(1-) related products: