| 摘要 |
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, wherein: A<1> represents a substituted or unsubstituted aryl group; A<2> represents a benzene ring having in total up to five substituents; X represents O, S or NR<1> wherein R<1> represents a hydrogen 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; Y represents O or S; R<2> represents hydrogen; R<3> represents hydrogen or an alkyl, aralkyl or aryl group or R<2> together with R<3> represents a bond; and n represents an integer in the range of from 2 to 6; a process for preparing such a compound, a pharmaceutical composition comprising such a compound and the use of such compound and composition in medicine. |
