Patent ID: 7638550

Claim:
A pyrrole derivative of general formula I, where: R 1 and R 3 each represent, independently, a substituent selected from the group consisting of a phenyl radical; mono- or polysubstituted phenyl in different positions on the ring; and a C5-C10 heteroaryl group which contains at least one heteroatom selected from the group consisting of O, N and S; R 2 is selected from the group consisting of a hydrogen atom, an electron attractor group, an amino group and an amide group; R 4 represents a hydrogen atom or a linear, branched or cyclic C1-C6 alkyl group; (n) represents a number of methylene groups between 1 and 8, both inclusive; (X) represents either a secondary amine group, an oxygen atom or a sulphur atom; (Y) is selected from the group consisting of a methylene group, a substituted methylene group and a secondary amine group; (Z) represents either an oxygen atom or a sulphur atom; and (W) is selected from the group consisting of hydroxyl, hydroxyamine, hydrazine, alkyl, aryl and heteroaryl-hydrazine.