5Gaffield W. Circular diehroism, optical rotatory dispers;on and absolute configuration of flavanones, 3-hydroxyflavanones and their glycosides [ J ]. Tetrahedron, 1970, 24:4093.
6Tsukasa lwashina, Junichi Kitajima, Sadamu Matsumoto, et al. Flavonoids in the species of Cyrtomium (Dryopteridaceae) and related genera[ J ]. Biochem Syst Ecol, 2006, 34:17.