Pyrrolopyridine derivatives (I) and their salts are new. Pyrrolopyridine derivatives of formula (I) and their salts are new. R 1, R 2H, halo or CF 3, preferably R 1 is Cl； R 3, R 4H or 1-4C alkyl； R : H or 1-3C alkyl； n : 1-2； X : a simple bond or O； and Ar 1(hetero)aromatic e.g. phenyl, naphthyl, benzothiazolyl, 3,4-dihydro-1,4-benzoxazinyl, 1,3-benzodioxolyl, 1,4-benzodioxanyl or benzoxazolyl (all optionally substituted by 1-6C alkyl, 1-4C alkoxy or amino), preferably phenyl or heteroaromatic. Independent claims are included for the preparations of (I). [Image] ACTIVITY : Antilipemic； Antidiabetic； Cardiovascular-Gen.； Antiinflammatory； Neuroprotective； Nootropic； Antiparkinsonian； Anorectic； Antiarteriosclerotic； Cardiant； Hypotensive； Antiarthritic； Antirheumatic. MECHANISM OF ACTION : Peroxisome proliferator activated receptor (PPAR) activator. The ability of (I) to activate PPAR-alpha and/or PPAR-gamma was tested. The results showed that (I) exhibited an EC 5 0 value of 4-1500 nM.
