Benzothiazine and benzothiadiazine compounds

摘要

Compounds of formula (I): wherein: R₁ represents a heterocycle, R₂ represents hydrogen, a halogen or hydroxy, A represents CR₄R₅ or NR₄, R₃ represents hydrogen, alkyl or cycloalkyl, R₄ represents hydrogen or alkyl, or A represents nitrogen and, together with the adjacent -CHR₃-, forms the ring wherein m represents 1, 2 or 3, R₅ represents hydrogen or a halogen, their isomers, and also addition salts thereof.