1. Department of Chemistry, University of Umeå, Umeå SE-901 87, Sweden
2. College of Life Sciences, Sichuan Agricultural University, Ya’an 625014, China
3. College of Resources Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
4. Department Biology I, Plant Sciences, Ludwig-Maximilians-University, Munich 82152 Planegg-Martinsried, Germany
5. Molecular Biomimetics, Department of Chemistry – Ångström Laboratory, Box 523, Uppsala University, SE-751 20 Uppsala, Sweden