| abstract |
A compound of ** formula ** in which R1 represents C1-12 alkyl (alkyl group which is optionally substituted and / or terminated with one or more substituents selected from halo, cyano, nitro, aryl, Het1, -C (O ) R5a, -OR5b, -N (R6) R5c, -C (O) XR7, -C (O) N (R8) R5d, and - S (O) 2R9), or R1 represents -C (O) XR7, - C (O) N (R8) R5d or -S (O) 2R9; R5a to R5d independently represent, at each occurrence, H, C1-6 alkyl (last group which is optionally substituted and / or terminated with one or more substituents selected from -OH, halo, cyano, nitro, aryl and Het2), aryl or Het3, or R5d, together with R8, represents C3-6 alkylene (alkylene group which is optionally interrupted by an O atom and / or optionally substituted with one or more C1-3 alkyl groups, or a pharmaceutically acceptable derivative of the same. |