1. College of Pharmacy and Chemistry; Yannan Dali University; Dali 671000 P. R. China
2. Institute of Medicinal Plant Development; Chinese Academy of Medical Sciences & Peking Union Medical College; Beijing 100193 P. R. China
3. Centre for Biotechnology & Microbiology; University of Peshawar; Pakistan
4. Southwest University for Nationalities; Chengdu 610064 P. R. China