1. Department of Medicinal Chemistry, School of Pharmacy, Xi’an Jiaotong University Health Science Center, Xi’an 710061, Shaanxi, P. R. China
2. Department of Medical Oncology, Shaanxi Provincial People’s Hospital, Xi’an 710068, Shaanxi, P. R. China
3. State Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co., LTD., Linyi 276000, Shandong, P. R. China