1. Key Laboratory for Green Organic Synthesis and Application of Hunan Province; The Key Laboratory of Environmentally Friendly Chemistry and Application of the Ministry of Education, College of Chemistry; Xiangtan University; Xiangtan 411105 P. R. China
2. Chengda Pharmaceuticals Co., Ltd.; Huanghe Road 36, Economic Development Zone, Jiashan Zhejiang 314100 P. R. China