1. Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People’s Republic of China
2. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, People’s Republic of China
3. Laboratory of Marine Drugs and Biological Products, National Laboratory for Marine Science and Technology, Qingdao 266235, People’s Republic of China