Ruan, Shucheng, Mousheng Liu, Li Bi, and Yaling Yang. 2010. “A New Phenylpropanoids From the Leaf of Smallanthus Sonchifolius and Its Antioxidant Activity”. Asian Journal of Chemistry 22 (7):5776-78. https://asianpubs.org/index.php/ajchem/article/view/31713.