1. Department of Chemistry University of Helsinki A.I. Virtasen aukio 1 00560 Helsinki Finland
2. Department of Chemistry Aalto University Kemistintie 1 02150 Espoo Finland
3. CAS Key Laboratory of Environmental and Applied Microbiology Environmental Microbiology Key Laboratory of Sichuan Province Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041 P. R. China