| 摘要 |
Compounds of formula (I):or a tautomeric form thereof, or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, wherein:A<1 >represents a substituted or unsubstituted aromatic heterocyclyl group;R<1 >represents a hydrocarbon atom, an alkyl group, an acyl group, an aralkyl group, wherein the aryl moiety may be substituted or unsubstituted, or a substituted or unsubstituted aryl group;R<2 >and R<3 >each represent hydrogen, or R<2 >and R<3 >together represent a bond;A<2 >represents a benzene ring having a total up to five substituents; andn 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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