1. Department of Physical and Analytical Chemistry; Uppsala University; PO Box 599 SE-751 24 Uppsala Sweden
2. Department of Biochemistry and Organic chemistry; Uppsala University; PO Box 576 SE-751 23 Uppsala Sweden
3. Department of Natural Sciences, Engineering and Mathematics; Mid Sweden University; SE-851 70 Sundsvall Sweden
4. Department of Organic Chemistry, Center for Analysis and Synthesis; Lund University; P.O. Box 124 SE-221 00 Lund Sweden