New Diarylheptanoids from the Rhizomes of Dioscorea spongiosa and Their Antiosteoporotic Activity - Yin, Jun; Kouda, Kyoji; Tezuka, Yasuhiro; Le Tran, Quan; Miyahara, Tatsuro; Chen, Yingjie; Kadota, Shigetoshi (Planta Medica, 2004)