Bioactive eudesmane and germacrane derivatives from Inula wissmanniana Hand.-Mazz. - Cheng, Xiang-Rong; Zhang, Shou-De; Wang, Chun-Hui; Ren, Jie; Qin, Jiang-Jiang; Tang, Xue; Shen, Yun-Heng; Yan, Shi-Kai; Jin, Hui-Zi; Zhang, Wei-Dong (Phytochemistry, 2013)