| abstract |
The invention concerns compounds of formula (I) in which: A forms a tricyclic system of formula A1, A2, A3 or A4; R1 represents a hydrogen atom, an alkyl, hydroxy, alkoxy or oxo group; (R2)m and (R3)m' are such as defined in the description; n represents an integer such that 0<=n<=3; p represents an integer such as defined in the description; B represents a group (a) or (b). The invention is useful for preparing medicines. |