| abstract |
1. The compound of the formula! R1-CO-X-Y-Z-R2,! wherein ! X and Z each represents optional groups independently selected from saturated or unsaturated carbon chains having 1 to 3 carbon atoms in length,! Y represents SO, S, SO2, CH = CH, CH2CH2 or O,! R1 is selected from the following groups! ! ! where the line indicates the point of attachment,! R2 is a heteroaryl group comprising a 15 optionally substituted 5- or 6-membered ring, where the ring contains only carbon and at least one nitrogen, or contains only carbon and at least two nitrogen and at least one sulfur,! and where (i) when R1 is and the group —CO — X — Y — Z — is CO — CH 2 —SO, CO — CH 2 —S or CO — CH 2 —SO 2, then R2 is different from, and! (ii) when R1 is, and the group —CO — X — Y — Z— is —CO — CH 2 —O—, then R2 is different from. ! 2. The compound according to claim 1, where R1 represents. ! 3. The compound according to claim 1, where R1 represents. ! 4. The compound according to claim 1, where R1 is selected from the following groups! . ! 5. The compound according to any one of claims 1 to 4 of the formula! R1-CO-X-Y-Z-R2,! where X and Z are independently selected from saturated or unsaturated carbon chains having 1-3 carbon atoms in length, and Y represents SO, S, SO2, CH = CH, CH2CH2 or O.! 6. The compound according to any one of claims 1 to 4 of the formula! R1-CO-X-Y-R2,! where X is selected from saturated or unsaturated carbon chains having a length of 1-3 carbon atoms, and Y represents SO, S, SO2, CH = CH, CH2CH2 or O.! 7. The compound according to any one of claims 1 to 4 of the formula! R1-CO-Y-Z-R2,! where Z is selected from saturated or unsaturated carbon chains having a length of 1-3 carbon atoms, and Y represents SO, S, SO2, CH = CH, CH2CH2 or O.! 8. The compound according to any one of claims 1 to 4 of the formula! R1-CO-Y-R2,! where Y is SO, |