SEARCH Articles Figures Tables 2- hydroxy-, prototropic tautomerism 6-Membered rings prototropic tautomerism Annular Prototropic Tautomerism Heteroaromatic compounds prototropic tautomerism Heteroaromatic compounds, free-radical prototropic tautomerism Katritzky, A. R., Lagowski, J. M., Prototropic Tautomerism of Heteroaromatic Perimidine, prototropic tautomerism Prototropic Prototropic tautomerism of heteroaromatic Prototropic tautomerism of heteroaromatic Overview and Methodology Prototropic tautomerism of heteroaromatic compounds Prototropic tautomerism of heteroaromatic compounds 27 Suppl Prototropic tautomerization Prototropic tautomerization Purines prototropic tautomerism Tautomeric prototropic equilibrium The Fault Line in Prototropic Tautomerism