3-HYDROXY-4-OXO-4H-PYRAN-2,6-DICARBOXYLIC ACID 3-Hydroxy-4-oxopyran-2,6-dicarboxylic acid 497-59-6 4H-Pyran-2,6-dicarboxylic acid, 3-hydroxy-4-oxo- EINECS 207-848-2 Meconic acid NSC 805