1. School of Chemistry and Life Sciences Hubei University of Education No. 129 Gaoxin 2nd Road Wuhan 430205 P. R. China
2. Hubei Key Laboratory of Purification and Application of Plant Anticancer Active Ingredients Hubei University of Education No. 129 Gaoxin 2nd Road Wuhan 430205 P. R. China
3. Research Center for Development and Utilization of Medicinal Plants in Eastern Hubei Province Hubei University of Education No. 129 Gaoxin 2nd Road Wuhan 430205 P. R. China
4. School of Life Sciences Xiamen University No. 4221–120 South Xiang'an Road Xiamen 361102 P. R. China