1. College of Pharmaceutical Sciences, Huaihai Institute of Technology, Lianyungang 222005, P.R. China
2. China University of Mining and Technology, Xuzhou 221116, P.R. China
3. Jiangsu Institute of Marine Resources, Lianyungang 222005, P.R. China
4. Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Huaihai Institute of Technology, Lianyungang 222005, P.R. China