| abstract |
A compound of formula (I):n or a tautomeric form thereof and/or a pharmaceutically acceptable salt thereof and/or a pharmaceutically acceptable solvate thereof, characterised in that: nR¹ represents hydrogen, alkyl, aralkyl or aryl and R² represents hydrogen or R¹ and R² together represent a bond; nR³ represents hydrogen and R⁴ represents hydrogen, alkyl, aralkyl or aryl or R³ and R⁴ together represent a bond; nX represents a bond, >C=O, >CHOH, O, S or NR wherein R is an alkyl group; nn represents an integer 1, 2 or 3; nm represents an integer 1, 2 or 3 and nA¹ and A² each independently represent a benzene ring having a total up to 5 substituents comprising up to 3 optional substituents; a process for preparing such a compound, a pharmaceutical composition comprising such a compound and the use of such compounds and compositions in medicine. |