SEARCH Articles Figures Tables 2- Pyrones, 4-oxy-substituted, dehydroacetic acid and related systems 2-Pyrone from coumalic acid 2-Pyrone-5-carboxylic acid 2-Pyrones acid anhydrides 2-Pyrones carboxylic acid chloride 4-Pyrones carboxylic acids 4-Pyrones, 2,6-disubstituted, from 1,3,5pentanetriones by acid cyclization 7-PYRONE-2,6-DICARBOXYLIC ACID A-Pyrone-6-carboxylic acid Acidity 4-hydroxy-2-pyrones Pyrone-carboxylic acids, decarboxylation Triacetic acid lactone and related pyrones Y-PyrONE-2,6-DICARBOXYLIC acid