A compound of formula: wherein X is a nitrogen atom; Y is an oxygen atom, a sulfur atom, a NH group or a N-(C1-C3)alkyl group; R1 is a -C(=A)-B group, wherein A is NH or O and B is a OR5 or a NR5R6 group, wherein R5 and R6 are independently chosen from a hydrogen atom, an unsubstituted C1-C8 alkyl group or a C1-C8 alkyl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups; A and B can alternatively independently be nitrogen and/or oxygen atoms and form, with the carbon atom to which they are bound, a heterocycloalkyl group; R2 is a hydrogen atom or an unsubstituted C1-C8 alkyl group; R3 is an unsubstitued C1-C8 alkyl; a C1-C8 alkyl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups; an unsubstituted aryl or heteroaryl group; or an aryl or heteroaryl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups; R4 is a hydrogen atom, a halogen atom, an amino group, a cyano group, an unsubstituted C1-C5 alkyl group or a C1-C5 alkyl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups; R7 and R8 are independently chosen from a hydrogen atom, a halogen atom, a hydroxyl group, an unsubstituted C1-C5 alkyl group or a C1-C5 alkyl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups. X is a nitrogen atom; Y is an oxygen atom, a sulfur atom, a NH group or a N-(C1-C3)alkyl group; R1 is a -C(=A)-B group, wherein A is NH or O and B is a OR5 or a NR5R6 group, wherein A is NH or O and B is a OR5 or a NR5R6 group, wherein R5 and R6 are independently chosen from a hydrogen atom, an unsubstituted C1-C8 alkyl group or a C1-C8 alkyl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups; A and B can alternatively independently be nitrogen and/or oxygen atoms and form, with the carbon atom to which they are bound, a heterocycloalkyl group; R2 is a hydrogen atom or an unsubstituted C1-C8 alkyl group; R3 is an unsubstitued C1-C8 alkyl; a C1-C8 alkyl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups; an unsubstituted aryl or heteroaryl group; or an aryl or heteroaryl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups; R4 is a hydrogen atom, a halogen atom, an amino group, a cyano group, an unsubstituted C1-C5 alkyl group or a C1-C5 alkyl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups; R7 and R8 are independently chosen from a hydrogen atom, a halogen atom, a hydroxyl group, an unsubstituted C1-C5 alkyl group or a C1-C5 alkyl group substituted by at least one group chosen from halogen atoms, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, hydroxyl, alkoxyl, alkenyl, alkynyl, CN, nitro and amino groups.