Fraxetin (7,8-dihydroxy-6-methoxy coumarin), found in Fraxinus rhynchophylla, shows potent antioxidant activity.fraxetin alleviates lipid peroxidation, enhances hepatic antioxidant capabilities, inhibits CYP2E1 activity, and reduced the inflammatory mediators, including TNF-α and IL-1β via up-regulation of hemeoxygenase-1 (HO-1) protein.