| abstract |
Compounds of the formula IN WHICH P to T1 are hydrogen, alkyl, alkoxy, alkenyl, alkenyloxy, substituted alkyl, substituted alkoxy, substituted alkenyl, substituted alkenyloxy, amino, substituted amino aminoalkoxy, substituted aminoalkoxy, nitro, halo, hydroxy, or benzyloxy the R1 groups are hydrogen, substituted or unsubstituted alkyl, alkoxy or aryl and X is a carbon - carbon bond or a single atom, which may be substituted, through which the chromone nuclei are linked, and pharmaceutically acceptable derivatives thereof, are indicated for use in the treatment of 'extrinsic' allergic asthma. |