SEARCH Articles Figures Tables 2-Pyrone ring opening, reductive 2-Pyrone ring synthesis 2-Pyrone ring-opening 2-Pyrones benzene ring 2-Pyrones ring synthesis 4-Pyrone 2- -6-phenyl-, ring 4-Pyrone ring 2,3-dihydro 4-Pyrone ring degradation 4-Pyrone ring opening with 4-Pyrones condensed, by double ring 4-Pyrones ring opening with base Pyron-ring substituted coumarins Pyrone ring Dihydropyrone Pyrone via furan ring Pyrone-ring construction Ring closure 4-pyrones, condensed Y-Pyrone ring