Patent ID: 8624036

Claim:
A compound of formula (I), wherein: R 1 is selected from: H and CH 3 ; R 2 is selected from: H and linear C 1 -C 4 -alkyl; X is OH or a residue of formula NHR 3 : wherein: R 3 is selected from: H, OH, C 1 -C 5 -alkyl, C 3 -C 6 -cycloalkyl, C 2 -C 5 -alkenyl, C 1 -C 5 -alkoxy; straight or branched C 1 -C 6 -alkyl, C 3 -C 6 -cycloalkyl, C 2 -C 6 -alkenyl, C 1 -C 6 -phenylalkyl, each of which is substituted with a carboxy (COOH) group; and a residue of formula SO 2 R 4 wherein R 4 is C 1 -C 2 -alkyl, C 3 -C 6 -cycloalkyl, C 1 -C 3 -haloalkyl; Y is a heteroatom selected from: S, O and N; Z is a residue selected from: halogen, C 2 -C 4 -alkenyl, C 2 -C 4 -alkynyl, C 1 -C 4 -alkoxy, hydroxy, carboxyl, C 1 -C 4 -acyloxy, phenoxy, cyano, nitro, amino, C 1 -C 4 -acylamino, halo-C 1 -C 3 -alkyl, halo-C 1 -C 3 -alkoxy, benzoyl, linear or branched C 1 -C 8 -alkanesulfonate, linear or branched C 1 -C 8 -alkanesulfonamides, and linear or branched C 1 -C 8 alkyl sulfonylmethyl; or a pharmaceutically acceptable salt thereof.