SEARCH Articles Figures Tables 1.2- Dihydropyrimidines, tautomerism 3,4-Dihydropyrimidine-2 -thione 3.4- Dihydropyrimidin-2 -thiones 3.4- dihydropyrimidin-2 Dihydropyrimidin-2-thione Dihydropyrimidine Dihydropyrimidines Of pyrimidine Pyrimidin-2-thiones Pyrimidine tautomerization Pyrimidine-2-thiones, desulfurization Tautomerism of dihydropyrimidines