PPARγ pure antagonist with micromolar affinity in 3T3-L1 and 3T3-F442A preadipocyte cells; selective over PPARδ and PPARα. Antagonizes the ability of rosiglitazone to stimulate transcriptional activity of PPARγ. Acts as a PPARγ agonist in an ECV304 cell line. Also produces PPARg-independent apoptosis of tumor cells via several mechanisms. Active in vivo.