1. Department of Chemistry, Universizty College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
2. Faculty of Chemistry, University of Warsaw, Pasteur 1, 02093 Warsaw, Poland
3. University of Warsaw, ICM, Pawinskiego 5a, 02106 Warsaw, Poland
4. Department of Organic and Nuclear Chemistry, Faculty of Sciences, Charles University in Prague, 12843 Prague 2, Czech Republic
5. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic