1. Department of Chemistry, Chuxiong Normal College, Chuxiong, Yunnan 675000, PR China
2. The Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, PR China
3. DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Mascheroder Weg 1b, D-38124 Braunschweig, Germany