The invention relates to compounds corresponding to formula (I), in the form of the base or of an acid-addition salt:

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in which n is equal to 0, 1, 2, 3 or 4; m is equal to 0, 1 or 2; o is equal to 0 or 1; X represents a group â€”CH₂, â€”CH(Râ€²)â€”, â€”NH(Râ€²)â€” or a heteroatom chosen from O and S, it being understood that Râ€² represents a group â€”(C1-C5)alkyl, â€”(C1-C5)alkoxy, â€”CH₂-aryl, â€”C(O)R5 or â€”COOR5; R1 represents an oxo group, â€”COOR5, â€”Wâ€”OH or â€”Wâ€”NR5R6; R2 represents an H atom or a group chosen from the groups (i) â€”(C1-C5)alkyl, (ii) â€”(C1-C5)alkoxy, (iii) â€”COOR5, (iv) â€”NR5R6, (v) â€”C(O)â€”NR5R6, (vi) â€”SO₂â€”NR3R4, (vii) heteroaryl optionally substituted with a group â€”(C1-C5)alkyl, (viii) â€”W-aryl, (ix) â€”W-heteroaryl, (x) â€”Oâ€”W-aryl, (xi) â€”Oâ€”W-heteroaryl and (xii) â€”Oâ€”Wâ€”NR5R6; it being understood that R3 and R4, (i) which may be identical or different, represent, independently of each other, an H atom, a group â€”(C1-C5)alkyl, â€”(C3-C6)cycloalkyl, aryl, heteroaryl, â€”CH₂-heteroaryl, â€”(C1-C5)alkyl-NR5R6, â€”Wâ€”OH or â€”Wâ€”NR5R6; or (ii) form, together with the nitrogen atom that bears them, a heterocycloalkyl group optionally substituted with one or more groups chosen from the groups â€”(C1-C5)alkyl and â€”CH₂-aryl; W is a group â€”(C1-C5)alkylene, optionally substituted with one or more hydroxyl groups; R5 and R6, which may be identical or different, represent, independently of each other, a hydrogen atom or a group chosen from the groups â€”(C1-C5)alkyl and the groups â€”(C3-C6)cycloalkyl, and also the process for preparing them and the therapeutic uses thereof.