Effects of iridoid and megastigmane glycosides from Cornus alternifolia on PPARα, PPARγ and LXR. Results were expressed as percent response of ciprofibrate (30 μ M), ciglitazone (10 μ M) and 25-hydroxyl-cholesterol (10 μ M), respectively, with respect to luciferase activity assessed by light production. Data were obtained from 3 experiments in duplicate. a: alternoside A, b: 8-epihastatoside, c: olean-12-en-oic acid, d: arjungenin, e: kaempferol-3-O-β-D-glucopyranoside, f: 4-O-β-D-xylopyranoside-3,3′-dimethyl ether.