1. Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
2. JEOL UK Ltd., Bankside, Long Hanborough, OX29 8LJ, UK
3. JEOL UK Ltd., Silver Court, Welwyn Garden City, AL7 1LT, UK
4. Department of Organic Chemistry, Faculty of Chemical Science, Complutense University of Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain