1. Department of Natural Medicine, School of Pharmacy, Fudan University, Shanghai 201203, PR China
2. School of Pharmaceutical Sciences, Zhejiang Provincial Key Laboratory of Plant Ecology and Conservation, Taizhou University, Zhejiang 318000, PR China
3. State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, PR China
4. Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai 200443, PR China
5. Department of Chemistry, Fudan University, Shanghai 200438, PR China