| abstract |
A compound of the formula I, wherein: R1 and R2 are independently selected from hydrogen, a C1-7 alkyl group, an optionally substituted C3-20 heterocyclyl or C5-20 aryl group, or together they can form, together with the nitrogen atom to which they are attached, an optionally substituted heterocyclic ring having between 4 and 8 ring atoms; X is CH or N; n is 1 or 2; RC1 and Rc2 are independently selected from H and methyl; when X is N, Rx is selected from the group consisting of H, and an optionally substituted group of C1-7 alkyl, C3-20 heterocyclyl, C5-20 aryl, acyl, ester, amido and sulfonyl; and when X is CH, Rx is selected from the group consisting of H, and an optionally substituted group of C1-7 alkyl, C3-20 heterocyclyl, C5-20 aryl, acyl, ester, amido, sulfonyl, amino and ether. |