1. Department of EcologySchool of Life SciencesNanjing University Nanjing 210046 P. R. China
2. State Key Laboratory of Pharmaceutical BiotechnologySchool of Life SciencesNanjing University Nanjing 210023 P. R. China
3. Key Laboratory of Chemistry in Ethnic Medicinal ResourcesState Ethnic Affairs Commission and Ministry of EducationYunnan Minzu University Kunming 650500 P. R. China