1. Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, China
2. Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou, Hainan, China
3. Pharmacy College, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, China
4. Hainan Vocational University of Science and Technology, Haikou, Hainan, China