2-18-00-00320 (Beilstein Handbook Reference) 2H-Pyran-6-carboxylic acid, 3,4-dihydro-2,2-dimethyl-4-oxo- 3,4-Dihydro-2,2-dimethyl-4-oxo-2H-pyran-6-carboxylic acid 4H-Pyran-2-carboxylic acid, 5,6-dihydro-6,6-dimethyl-4-oxo- 5,6-Dihydro-6,6-dimethyl-4-oxo-4H-pyran-2-carboxylic acid 80866-93-9 Acide dimethyl-6,6 dihydro-5,6 pyrone-4 carboxylique-2 [French] BRN 0121772 EINECS 279-596-1