Rehmannic acid (lantadene A) is a compound isolated from Lantana camara. Rehmannic acid shows considerable in vitro antioxidant, free radical scavenging capacity activities in a dose dependant manner. Rehmannic acid is a promising candidate for use as an antioxidant and hepatoprotective agent[1][2].
[1] Barton, D. H. R., et al. Triterpenoids. Part XXIII. The nature of lantadene A.
[2] Grace-Lynn C, et al. In vitro antioxidant activity potential of lantadene A, a pentacyclic triterpenoid of Lantana plants. Molecules. 2012;17(9):11185-11198.