Chemical studies on the constituents of the Thymelaeaceous plants. IV. Structures of a new spiro biflavonoid, genkwanol A, from the root of Daphne genkwa Sieb. Et Zucc. - Baba ,K,.; Takeuchi ,K,.; Tabata ,Y,.; Taniguchi ,M,.; Kozawa ,M.. (Yakugaku Zasshi, 1987)