5-(3-carboxylato-3-oxoprop-1-en-1-yl)-4,6-dihydroxypyridine-2-carboxylate
5-(3-carboxylato-3-oxoprop-1-en-1-yl)-4,6-dihydroxypyridine-2-carboxylate
Dicarboxylate anion of  5-(3-carboxy-3-oxopropenyl)-4,6-dihydroxypyridine-2-carboxylic acid; major species at pH 7.3.