A bicyclic aromatic compound fusing benzene with a six-membered ring containing sulfur and nitrogen, important in medications and dyes.
'Benzo-' plus 'thiazine' (from 'thio-' sulfur and '-azine' nitrogen). Thiazines were developed in the early 20th century and proved pharmacologically valuable.
Benzothiazine is the parent structure of some genuinely important drugs—pharmaceutical chemists discovered that slight modifications of this ring system produce antibiotics, antihistamines, and psychotropic medications that have saved millions of lives.
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