This invention is concerned with compounds of the formula (I) wherein one ofR5, R6 and R7 is (a) and X1, X2, R1 to R15 and n are as defined in thedescription, and pharmaceutically acceptable salts and/or esters thereof. Theinvention further relates to pharmaceutical compositions containing suchcompounds, to a process for their preparation and to their use for thetreatment and/or prevention of diseases which are modulated by PPAR.delta.and/or PPAR.alpha. agonists.
