9Ng TB,Liu F,Wang ZT et al. Antioxidative activity of natural products from plants. Life Sci, 2000 ;(8) :709-23.
10Gao Z, Huang K, Xu H etal. Protective effects of flavonoids in the roots of Scutellaria baicalensis Georgi against hydrogen peroxide-induced oxidative stress in HS-SY5Y cells. Pharmacol Res, 2001 ;43(2) : 173-8.