1. School
of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072 P. R. China
2. School
of Pharmacy, University of Wisconsin, Madison, Wisconsin 53705, United States
3. Key
Laboratory of Marine Drugs, Chinese Ministry of Education, School
of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
4. Laboratory
for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, P. R. China