| 摘要 |
PCT No. PCT/JP80/00309 Sec. 371 Date Aug. 24, 1981 Sec. 102(e) Date Aug. 24, 1981 PCT Filed Dec. 17, 1980 PCT Pub. No. WO81/01848 PCT Pub. Date Jul. 9, 1981.Benzothiazine derivatives represented by the formula <IMAGE> wherein R1 is hydrogen, alkyl, alkoxycarbonyl, alkoxalyl, phenyl which may optionally have a substituent or substituents, cycloalkyl or aralkyl, R2 is hydrogen or alkyl, X is sulphur or oxygen, and Y is methylene or ethylene, and acid addition salts thereof. These compounds are useful as analgesic agents, anti-inflammatory agents, anti-allergic agents, anti-arthritic agents, circulation-improving agents or like pharmaceutics.
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