1. Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, China
2. Key Laboratory of Research and Development of Tropical Fruit and Vegetable of Haikou City, Hainan Normal University, Haikou 571158, China
3. Key Laboratory of Southern Medicinal Plants Resources of Haikou City, Hainan Normal University, Haikou 571158, China
4. Key Laboratory of Tropical Medicinal Plants Chemistry of Hainan Province, Hainan Normal University, Haikou 571158, China