A method of activating PPAR receptors in a subject, said method comprising
administering to said subject an effective PPAR receptor activating
amount of a pyrrolopyridine compound corresponding to formula (I):
##STR00001##
wherein R, R.sub.1, R.sub.2, R.sub.3, R.sub.4, X, Ar and n have defined
meanings, or a pharmaceutically acceptable salt thereof, particularly as
part of the treatment of a disorder or disease state selected from the
group consisting of atherosclerosis, myocardial infarction, hypertension,
and cerebral vascular disease.