SEARCH Articles Figures Tables 2,2 -Bi-4,5-dihydrothiazine Cephalosporin dihydrothiazine ring Dihydrothiazine Dihydrothiazine Dihydrothiazine Oxides and Imines Dihydrothiazine Ring Modifications Dihydrothiazine imine Dihydrothiazine oxide Dihydrothiazine oxide conformation Dihydrothiazine oxide reactions Dihydrothiazine structure Dihydrothiazines preparation Dihydrothiazines reduction Dihydrothiazines, rearrangement