Showing structure for 2-({4-carboxy-4-[(2-{[(5-{2,4-dihydroxy-8-oxopyrimido[4,5-b]quinolin-10-yl}-2,3,4-trihydroxypentyl)oxy(hydroxy)phosphoryl]oxy}-1-hydroxypropylidene)amino]-1-hydroxybutylidene}amino)pentanedioic acid