| abstract |
A compound having the structural formula (Ia): ** (See formula) ** or a salt or solvate thereof; where m is 4 and n is 0 or m is 3 and n is 1 or m and n are both 2; q is 0, 1, 2 or 3; X is a covalent bond; each R2 is independently selected from the group consisting of alkyl, halo, hydroxyl, alkoxy, amino, alkylamino, cyano, nitro, haloalkyl, carboxylic acid, amide, ester, acyl, thiol, alkylthio, and sulfonamide and Y is alkyl, substituted alkyl , carbocyclyl, substituted carbocyclyl, heterocyclyl, substituted heterocyclyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, aralkyl, substituted aralkyl, heteroarylalkyl or substituted heteroarylalkyl. |