1. Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China
2. Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethno-medicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi 563003, P. R. China