Inhibition of Prostaglandin E2 Production by the Isoflavones Tectorigenin and Tectorigenin Isolated from the Rhizomes of Belamcanda chinensis - Shin, Kuk Hyun; Kim, Yong Pil; Lim, Soon Sung; Lee, Sanghyun; Ryu, Nama; Yamada, Masateru; Ohuchi, Kazuo (Planta Medica, 1999)