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Ming-Mei Wu, Li-Qin Wang, Yan Hua, Ye-Gao Chen, Yuan-Yuan Wang, Xing-Yao Li, Yan Li, Ting Li, Xun-Yun Yang, Zheng-Rong Tang. "New Chalcone and Dimeric Chalcones with 1,4-p-Benzoquinone Residue fromCombretum yunnanense." Planta Medica 77.05 (2010) 481-484