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3-[5-[(E)-[(5E)-5-[[5-[(Z)-[3-(2-carboxyethyl)-4-methyl-5-oxo-pyrrol-2-ylidene]methyl]-4-methyl-3-vinyl-1H-pyrrol-2-yl]methylene]-4-methyl-3-vinyl-pyrrol-2-ylidene]methyl]-4-methyl-2-oxo-pyrrol-3-yl]p related products: