A compound of general formula (I): ** (See formula) ** in which: A represents a group: ** (See formula) ** in which * indicates the point of union of said groups with the rest of the molecule; and R1 represents a linear C1-C6-alkyl group, a branched C3-C6-alkyl group or a C3-C6-cycloalkyl group that is optionally substituted, one or more times, independently of one another, with a substituent selected from: an atom halogen, a group -CN, C1-C6 alkyl-, C1-C6 haloalkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C10- cycloalkyl, aryl-, -C (>; = O) NH2, -C (>; = O) N (H) R ', -C (>; = O) N (R') R ", -C (>; = O) OH, -C (>; = O) OR ', -NH2 , -NHR ', - N (R') R ", -N (H) C (>; = O) R ', -N (R') C (>; = O) R ', -N (H) S ( >; = O) R ', -N (R') S (>; = O) R ', -N (H) S (>; = O) 2R', -N (R ') S (>; = O) 2R' , - N>; = S (>; = O) (R ') R ", -OH, C1-C6 alkoxy, C1-C6 haloalkoxy, -OC (>; = O) R', -OC (>; = O) NH2, -OC (>; = O) NHR ', -OC (>; = O) N (R') R ", -SH, C1-C6-S- alkyl, -S (>; = O) R ', -S (>; = O) 2R ', -S (>; = O) 2NH2, -S (>; = O) 2NHR', -S (>; = O) 2N (R ') R "; R2 represents a hydrogen atom; R3 represents a substituent selected from: a halogen atom, a group -CN, C1-C6 alkyl-, C1-C6 haloalkyl, C2-C6 alkenyl, C2-C6 alkynyl-, -C (>; = O) R ', -C (>; = O) NH2, -C (>; = O) N (H) R ', -C ( >; = O) N (R ') R ", -NH2, -NHR', -N (R ') R", -N (H) C (>; = O) R', -N (R ') C ( >; = O) R ', -N (H) C (>; = O) NH2, -N (H) C (>; = O) NHR', -N (H) C (>; = O) N (R ') R ", -N (R ') C (>; = O) NH2, -N (R') C (>; = O) NHR ', -N (R') C (>; = O) N (R ') R ", -N (H) C (>; = O) OR ', -N (R') C (>; = O) OR ', -NO2, -N (H) S (>; = O) R', -N (R ') S (>; = O) R', -N (H) S (>; = O) 2R ', - N (R') S (>; = O) 2R ', -N>; = S (>; = O) (R ') R ", -OH, C1-C6 alkoxy-, C1-C6 haloalkoxy, -OC (>; = O) R', -SH, C1-C6-S- alkyl, - S (>; = O) R ', -S (>; = O) 2R', -S (>; = O) 2NH2, -S (>; = O) 2NHR ', -S (>; = O) 2N (R') R ", -