Thiadiazine derivatives R 0660 Synthesis of Novel Benzo-1,2,5-thiadiazines, Their Antimicrobial Activity and Isomerization into Benzo-1,2,4-triazines. -Compound (IVc) shows high antimicrobial activity against S. aureus and B. subtilis and antifungal activity against A. niger [for compounds (III) no yields given]. -(DEOHATE, P. P.; DEOHATE, J. P.; BERAD*, B. N.; J. Indian Chem. Soc. 81 (2004) 9, 775-777; Postgrad. Dep. Chem., Shri Shivaji Sci. Coll., Amravati 444 603, India; Eng.) -C. Oppel 36-166