SMILES: C1=C(C(=O)NC(=C1C2=C(NC(=O)C(=C2)O)O)O)O
Description: The molecule is a bipyridine that is 3,3'-bipyridine bearing six hydroxy groups at positions 2, 2', 5, 5', 6 and 6'. It derives from a 2,3,6-trihydroxypyridine.