1. State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China;
2. Key Laboratory of Biosynthesis of Natural Products of National Health commission of the People's Republic of China, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China;
3. College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250014, China