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3H-Indolium,1-(3,3-diethoxypropyl)-2-[3-[1-(3,3-diethoxypropyl)-5-(2-ethoxy-2-oxoethyl)-1,3-dihydro-3,3-dimethyl-2H-indol-2-ylidene]-1-propenyl]-5-(2-ethoxy-2-oxoethyl)-3,3-dimethyl- related products: