1. School of Pharmaceutical Sciences; Shandong University; Jinan Shandong 250012 PR China
2. State Key Laboratory of Phytochemistry and Plant Resources in West China; Kunming Institute of Botany; Chinese Academy of Sciences; Kunming 650204 PR China
3. Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Shenzhen 518055 China
4. The Key Laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences; 550002 China