Affiliation: | 1. College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers, Ministry of Education, Wuhan University, Hubei, Wuhan 430072 (P.R. China), Fax: (+86)?27‐8733‐6380;2. State Key Laboratory of Natural and Biomimetic Drugs, Peking University and State Key Laboratory of Applied Organic Chemistry, Lanzhou University (P.R. China) |