Patent ID: 7407971

Claim:
A compound of formula (Ia) wherein R is a —COR a group, wherein R a is hydrogen or an optionally substituted group selected from straight or branched C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, aryl, arylalkyl, heterocyclyl and heterocyclylalkyl; R 1 is a group of formula (IIa) wherein the cycle represents a 5 to 7 membered heterocyclic ring, wherein X, directly linked to the rest of the molecule, represents a carbon or nitrogen atom; Y is a carbon, nitrogen, oxygen or sulfur atom or it is an NH group, provided that at least one of X and Y is other than a carbon atom; R c is, independently from each other and in any one of the free positions of the heterocyclic ring of formula (IIa), an optionally substituted group selected from straight or branched C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, aryl, arylalkyl, heterocyclyl, heterocyclylalkyl, amino, aminocarbonyl, carboxy, oxo (═O), alkoxycarbonyl, alkylcarbonyl or arylcarbonyl; and n is 0 or an integer from 1 to 4; or a pharmaceutically acceptable salt thereof.