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3-[2-[[3-(2-carboxyethyl)-4-methyl-5-[(3-methyl-5-oxo-4-vinyl-pyrrol-2-yl)methylene]pyrrol-2-ylidene]methyl]-5-[(3-ethylidene-4-methyl-5-oxo-pyrrolidin-2-ylidene)methyl]-4-methyl-1H-pyrrol-3-yl]propan related products: