SEARCH Articles Figures Tables 1,4-Thiazine 3.6- Dihydro-1,2-thiazine 1-oxide Dihydro-1,4-thiazine 1-oxides synthesis Dihydro-1,4-thiazines oxidation Thiazin Thiazine 1-oxides, synthesis Thiazine oxides, dihydroDiels-Alder reactions