1. College of Biological and Pharmaceutical Sciences China Three Gorges University No.8 Daxue Road, Xiling District Yichang Hubei 443002 P. R. China
2. College of Chemistry and Molecular Sciences Wuhan University N o. 299, Bayi Road, Wuchang District Wuhan Hubei 430000 P. R. China
3. Medical College China Three Gorges University No.8 Daxue Road, Xiling District, Y ichang Hubei 443002 P. R. China