Compound of formula (I): in which: m represents an integer from 1 to 4 inclusive, and n and p an integer from 0 to 4 inclusive, X represents O, S or a
single bond, R1 represent
hydrogen or
halogen, or
alkyl, alkoxy, hydroxy, trihaloalkyl or trihaloalkoxy, R2, R3 and R4, which may be same or different, each represents
hydrogen or
alkyl, R5 represents
hydrogen or
halogen, or alkoxy, aryloxy or heteroaryloxy, R6, R7 and R8, which may be same or different, each represents hydrogen or
alkyl, or together form, with the atoms carrying them respectively, an optionally substituted heterocycle, R9 represents SO3H, -CO2R10, -CO-NR11R12, or -NR13R14, wherein R10, R11, R12, R13 and R14 each represents hydrogen or alkyl or together (R11 / R12; R13 / R14) form, with
nitrogen carrying them, heterocycle, isomers thereof, and addition salts thereof with a pharmaceutically-acceptable acid or base.