1. Department of Pharmacognosy; College of Pharmacy; Zhengzhou University; No. 100 of Science Road Zhengzhou 450001 P. R. China
2. State Key Laboratory of Natural Medicines; China Pharmaceutical University; No. 24 Tongjia Lane Nanjing 210009 P. R. China
3. Henan Taifeng Pharmaceutical Science and Technology Group Co., Ltd.; Zhengzhou 450001 P. R. China