New Triterpenoids from Kadsura heteroclita and their Cytotoxic Activity - Wang, Wei; Liu, Jinzhi; Han, Jian; Xu, Zhengren; Liu, Rongxia; Liu, Peng; Wang, Weixing; Ma, Xiaochi; Guan, Shuhong; Guo, Dean (Planta Medica, 2006)