Taraxasterane-Type Triterpene and Neolignans from Geum japonicum Thunb. var. chinense F. Bolle - Cheng, Xiangrong; Qin, Jiangjiang; Zeng, Qi; Zhang, Shoude; Zhang, Fei; Yan, Shikai; Jin, Huizi; Zhang, Weidong (Planta Medica, 2011)