1. Guizhou Medicine Edicine Edible Plant Resources Research and Development Center; Guizhou University; Guiyang 550025 People's Republic of China
2. Department of Dermatology; Hospital Affiliated to Guiyang Medical College; Guiyang 550025 People's Republic of China
3. Key Laboratory for Asymmetric Synthesis & Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry; Chinese Academy of Sciences; Chengdu 610041 People's Republic of China