Compounds of formula (I) are agonists of PPARγ, useful for the treatment of respiratory disease； formula (I): wherein R1, R2 or R3 each independently represents halo, cyano, nitro, amino, alkyl, haloalkyl, alkoxy, haloalkoxy, carboxylic acid or an ester or amide thereof； R4 represents hydrogen or alkyl； m, n or p independently represents 0, 1, 2 or 3.
