1. Department of Organic Chemistry, Faculty of Agricultural and Applied Biological Sciences, University of Gent, Coupure Links 653, B-9000 Gent, Belgium, Novosibirsk Institute of Organic Chemistry, Novosibirsk, 630090 Russia, HNMR Center (HNMR) and Laboratory of Organic Chemistry (ORGC), Free University of Brussels, Pleinlaan 2, B-1050 Brussels, Belgium, Department of Inorganic and Analytical Chemistry, University of Szeged, P.O. Box 440, H-6701 Szeged, Hungary, Biological Research Center, Hungarian Academy...