Benzothiazine derivatives

Abstract

This invention relates to novel benzothiazine derivatives having therapeutic effect on autoimmune diseases, to processes for preparation of such derivatives, and to pharmaceutical compositions containing such derivatives, the derivatives having the formula: ##STR1## wherein R.sup.1 is lower alkyl which may have one or more substituents selected from carboxy, aryl and carboxy(lower)cycloalkyl; aryl which may have one or more substituents selected from halogen, lower alkyl, halo(lower)alkyl and lower alkoxy; haloarylamino; or heterocyclic group; R.sup.2 is hydrogen, lower alkyl, lower alkylamino(lower)alkyl, aryl or ar(lower)alkyl; R.sup.3 is hydrogen, halogen, lower alkyl or lower alkoxy; and n is an integer 0 to 2.

Dependencies are inferred from the claim text.