A compound of general formula,,, or, or a salt thereof wherein: i. A represents a carbonyl group (=O), or a hydroxy group (-OH), a methoxy group (-OCH 3), an ethoxy group (-OCH 2 CH 3), a thiomorpholine 1,1-dioxide group, or a group - OC (CH 2) n COOH, with n being an integer number from 1 to 4; ii. L represents -OC -; iii. Y represents an unsubstituted or substituted alkyl group, or an unsubstituted or substituted heteroaryl group; and iv. W represents -F, -Cl, -NH 2, -N 3, a substituted or unsubstituted triazolyl group, a substituted or unsubstituted alkyloxy, alkenyloxy, or alkynyloxy group, or a group -NR 1 R 2 or -NHC R 1, where: the R 1 group represents a hydrogen atom or an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkenyl group, an unsubstituted or substituted alkynyl group, the R 2 group represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkenyl group, an unsubstituted or substituted alkynyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted heteroaryl group, or the R 1 and the R 2 are connected together to form, with the nitrogen atom, an unsubstituted or substituted 5-12 membered ring, said ring optionally comprising one or more heteroatoms or group selected from -CO-, -SO-, --SO 2 --, and -PO-group. i. A represents a carbonyl group (=O), or a hydroxy group (-OH), a methoxy group (-OCH 3), an ethoxy group (-OCH 2 CH 3), a thiomorpholine 1,1-dioxide group, or a group - OC (CH 2) n COOH, with n being an integer number from 1 to 4; ii. L represents -OC -; iii. Y represents an unsubstituted or substituted alkyl group, or an unsubstituted or substituted heteroaryl group; and iv. W represents -F, -Cl, -NH 2, -N 3, a substituted or unsubstituted triazolyl group, a substituted or unsubstituted alkyloxy, alkenyloxy, or alkynyloxy group, or a group -NR 1 R 2 or -NHC R 1, where: the R 1 group represents a hydrogen atom or an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkenyl group, an unsubstituted or substituted alkynyl group, the R 2 group represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkenyl group, an unsubstituted or substituted alkynyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted heteroaryl group, or the R 1 and the R 2 are connected together to form, with the nitrogen atom, an unsubstituted or substituted 5-12 membered ring, said ring optionally comprising one or more heteroatoms or group selected from -CO-, -SO-, --SO 2 --, and -PO-group. the R 1 group represents a hydrogen atom or an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkenyl group, an unsubstituted or substituted alkynyl group, the R 2 group represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkenyl group, an unsubstituted or substituted alkynyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted heteroaryl group, or the R 1 and the R 2 are connected together to form, with the nitrogen atom, an unsubstituted or substituted 5-12 membered ring, said ring optionally comprising one or more heteroatoms or group selected from -CO-, -SO-, --SO 2 --, and -PO-group.