Coumalicacid (6CI);Glutaconic acid, 4-(hydroxymethylene)-, d-lactone (7CI);2-Oxo-1(2H)-pyran-5-carboxylic acid;2-Oxo-2H-pyran-5-carboxylic acid;2-Oxopyran-5-carboxylic acid;2-Pentenedioicacid, 4-(hydroxymethylene)-, d-lactone;NSC 22978;a-Pyrone-5-carboxylic acid;
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