| 摘要 |
<p>A compound of formula (I): <CHEM> or a tautomeric form thereof and/or a pharmaceutically acceptable salt thereof and/or a pharmaceutically acceptable solvate thereof, characterised in that: R<1> represents hydrogen, alkyl, aralkyl or aryl and R<2> represents hydrogen or R<1> and R<2> together represent a bond; R<3> represents hydrogen and R<4> represents hydrogen, alkyl, aralkyl or aryl or R<3> and R<4> together represent a bond; X represents a bond, >C=O, >CHOH, O, S or NR wherein R is an alkyl group; n represents an integer 1, 2 or 3; m represents an integer 1, 2 or 3 and A<1> and A<2> 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.</p> |
