1. Key Laboratory of Marine Drugs, The Ministry of Education of China School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
2. Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
3. Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China
4. Syngenta Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK