Hepatoprotective Effect of Apocynum venetum and its Active Constituents - Xiong, Quangbo; Fan, Wenzhe; Tezuka, Yasuhiro; Adnyana, I Ketut; Stampoulis, Pavlos; Hattori, Masao; Namba, Tsuneo; Kadota, Shigetoshi (Planta Medica, 2000)