COMPOUND

摘要

There is provided a compound of formula R1-CO-X-Y-Z-R2 wherein X and Z are each optional groups independently selected from saturated or unsaturated carbon chains having a length of 1 to 3 carbons; Y is SO, S, SO2, CH=CH, CH2CH2 or O; R1 is selected from the following groups (A) wherein - - - denotes the point of attachment; R2 is a heteroaryl group comprising an optionally substituted 5 or 6 membered ring, which ring contains only carbon and at least one nitrogen, or contains only carbon, and at least two nitrogens and at least one sulphur; and wherein (i) when R1 is group (B) and -CO-X-Y-Z- is CO-CH2-SO, CO-CH2-S, or CO-CH2-SO2, R2 is other than group (C) and; (ii) when R1 is group (D) and -CO-X-Y-Z- is -CO-CH2-O-, R2 is other than group (E).