Showing structure for 1-{1-carboxy-3-[(3-carboxy-3-{2-[2-(2-carboxy-2-hydroxy-5-oxopyrrolidin-1-yl)ethoxy]-2-oxoethyl}-1,3-dihydroxypropylidene)amino]propyl}-2-hydroxy-5-oxopyrrolidine-2-carboxylic acid