1. Neue Benzothiazine, II. 3.4‐Dihydro‐2
H
‐1.2‐benzothiazinon‐(3)‐1.1‐dioxid und 3.4‐Dihydro‐1
H
‐2.3‐benzothiazinon‐(4)‐2.2‐dioxid
2. E. Sianesi, I. Setnikar, E. Massarani and P. DaRe, German Patent 2,022,694 (1970).
3. Chem. Abstr., 74, 141829s (1971).
4. E. Sianesi, P. DaRe, I. Setnikar and E. Massarani, German Patent 2,065,333 (1973).
5. Chem. Abstr., 78, 15964s (1973).