1. Department of Chemistry Syracuse University 111 College Place, Syracuse NY 13244 USA
2. Department of Chemistry Taras Shevchenko National University of Kyiv 64 Volodymyrska St. Kyiv 01601 Ukraine
3. VIB Centre for Structural Biology Vlaams Instituut voor Biotechnologie (VIB) Pleinlaan 2 Brussels 1050 Belgium
4. Jean Jeener NMR Cetre Vrije Universiteit Brussel (VUB) Pleinlaan 2 Brussels 1050 Belgium
5. Department of Chemistry and Biochemistry College of Charleston 66 George St. Charleston SC 29424 USA