SEARCH Articles Figures Tables 2- benzimidazole tautomerism 2- benzimidazole tautomerism 2-Methyl-5 -substituted benzimidazoles tautomerism 5 -Substituted benzimidazoles, tautomerism Benzimidazoles annular tautomerism Benzimidazoles methyl-, tautomerism Benzimidazoles, 2-amino-, tautomerism