| 摘要 |
Compounds of formula (I): or a tautomeric form thereof, or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, wherein: A1 represents a substituted or unsubstituted aromatic heterocyclyl group; R1 represents a hydrocarbon atom, an alkyl group, an acyl grup, an aralkyl group, wherein the aryl moiety may be substituted or unsubstituted, or a substituted or unsubstituted aryl group; R2 and R3 each represent hydrogen, or R2 and R3 together represent a bond; A2 represents a benzene ring having a total up to five substituents; and n represents an integer in the range of from 2 to 6; pharmaceutical compositions containing such compounds and the use of such compounds and compositions in medicine.
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