1. Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden
2. Department of Chemistry−BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
3. Medical Inflammation Research, Department of Medical Biochemistry and Biophysics, Karolinska Institute, SE-171 77 Stockholm, Sweden
4. School of Pharmaceutical Science, Southern Medical University, Guangzhou, China