3-((2E)-2-((3-(2-Carboxyethyl)-4-methyl-5-((E)-(4-methyl-5-oxo-3-vinyl-1,5-dihydro-2H-pyrrol-2-ylidene)methyl)-1H-pyrrol-2-yl)methylene)-4-methyl-5-oxo-2,5-dihydro-1H-pyrrol-3-yl)propanoic acid
3-((2e)-2-((3-(2-carboxyethyl)-4-methyl-5-((e)-(4-methyl-5-oxo-3-vinyl-1,5-dihydro-2h-pyrrol-2-ylidene)methyl)-1h-pyrrol-2-yl)methylene)-4-methyl-5-oxo-2,5-dihydro-1h-pyrrol-3-yl)propanoic acid