TY - JOUR T1 - Natural and unnatural anthraquinones isolated from the ethanol extract of the roots of Knoxia valerianoides JF - Acta Pharmaceutica Sinica B Y1 - 2012 A1 - Zhao, Feng A1 - Wang, Sujuan A1 - Lin, Sheng A1 - Zhu, Chenggen A1 - Yue, Zhenggang A1 - Yu, Yang A1 - Liu, Bo A1 - Wu, Xiuli A1 - Yang, Yongchun A1 - Li, Yan A1 - others SP - 260–266 VL - 2 ER -