1. School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P. R. China
2. The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, 523808, China
3. Guangdong Provincial Key Laboratory of Research and Development of Natural Drugs, and School of Pharmacy, Guangdong Medical University, Guangdong Medical University Key Laboratory of Research and Development of New Medical Materials, Dongguan, 523808, China
4. Department of Chemistry, Faculty of Science, University of Lucknow, Lucknow 226 007, India