SEARCH Articles Figures Tables 1,3-Benzothiazines, synthesis 2.1- Benzothiazine 2,2-dioxides synthesis 3- -3,4-dihydro- -1,1-dioxid 4/7-1,4-benzothiazin Benzothiazine Dihydro synthesis Dihydro-1,4-benzothiazines L derivatives Synthesis of derivatives