英文同义词:
GAMMA-PYRONE-2-CARBOXYLIC ACID;COMANIC ACID;4-OXO-4H-PYRAN-2-CARBOXYLIC ACID;COMMANIC ACID;γ-Pyrone-2-carboxylic acid;4-Oxo-4H-pyran-2-carboxylic Acid gamma-Pyrone-2-carboxylic Acid;4H-Pyran-2-carboxylic acid, 4-oxo-;4-oxopyran-2-carboxylic acid