1. Li Dak Sum Yip Yio Chin Kenneth Li Marine Biopharmaceutical Research Center Department of Marine Pharmacy College of Food and Pharmaceutical Sciences Ningbo University Ningbo 315800 Zhejiang China
2. Institute of Drug Discovery Technology Ningbo University Ningbo 315211 Zhejiang China
3. Ningbo Institute of Marine Medicine Peking University Ningbo 315800 Zhejiang China