1. The Key Laboratory for Microbial Resources of Ministry of Education, PR China, Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, PR China
2. Department of Chemistry, Chuxiong Normal College, Chuxiong, Yunnan 675000, PR China
3. Korea Research Institute of Bioscience and Biotechnology, 52 Oeundong, Yusong, Daejeon 305-333, Republic of Korea