1. School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin, Guangxi 541004, P. R. China
2. Molecular Diagnosis and Treatment Center for Infectious Diseases, Dermatology Hospital, Southern Medical University, Guangzhou, Guangdong 510091, P. R. China
3. The Second Affiliated Hospital of Hunan University of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, Hunan 410005, P. R. China