1. Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Gilead Sciences & IOCB Research Center, Flemingovo nám. 2, 16610 Prague 6 (Czech Republic)
2. Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 61265 Brno (Czech Republic)
3. Central European Institute of Technology, Masaryk University, Kamenice 753/5, 625 00 Brno (Czech Republic)
4. Department of Organic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 8, 12843 Prague 2 (Czech Republic)