| abstract |
Compounds of formula (I) in which X1 and X2, which may be the same or different, denote hydrogen, a C1 to C6 alkyl residue or a halogenated atom or, if they occupy neighboring positions, form together with the carbon atoms which carry them, a fused phenyl ring, and R denotes a carbocyclic or heterocyclic residue, saturated or unsaturated, optionally substituted, as well as their physiologically compatible salts. The invention also relates to a process for the preparation of said compounds and to medicaments containing these compounds for the treatment of allergic diseases. |