1. College of Chemistry and Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, Xianyang 712100, Shaanxi, P. R. China
2. School of Pharmacy, Baotou Medical College, Baotou 014060, Inner Mongolia, P. R. China
3. Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, P. R. China