Pharmaceutically active bis-carboxychromone compounds

Claim 1

A compound selected from the group consisting of the formula and pharmaceutically acceptable salts, esters derived from alcohols containing 1-10 carbon atoms and amides derived from ammonia, primary or secondary lower alkyl amines or aniline, wherein X iS selected from the group consisting of benzene, naphthalene, cyclopentadiene, cycloheptane, cyclopentane, cyclohexane, pyridine, piperidine, piperazine, pyrazine, pyrrolidine, morpholine and pyrone rings, optionally substituted by hydroxy, halogen or lower alkyl, and straight or branched, saturated or unsaturated hydrocarbon chains containing 2-10 carbon atoms, optionally interrupted by at least one of the carbocyclic or heterocyclic rings specified above or by an oxygen or nitrogen atom, and P, Q, R, P1, Q1 and R1 are the same or different and each is selected from the group consisting of hydrogen, nitro, amino, amino lower alkoxy, cyano, halogen, hydroxy, lower alkyl, lower alkenyl, lower alkynyl, lower alkoxy, lower alkenyloxy and lower alkynyloxy groups, optionally substituted by at least one of hydroxy, halogen, lower alkyl and lower alkoxy.