Showing structure for 3-[(2z,5z)-2-{[3-(2-carboxyethyl)-5-{[(2z)-3-ethenyl-5-hydroxy-4-methylpyrrol-2-ylidene]methyl}-4-methyl-1h-pyrrol-2-yl]methylidene}-5-[(4-ethenyl-3-methyl-5-oxopyrrol-2-yl)methylidene]-4-methyl-1h-pyrrol-3-yl]propanoic acid