1. School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom, Department of Chemical Informatics, Faculty of Education, University of Szeged, Boldogasszony sgt. 6, 6725 Szeged, Hungary, and Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náméstí 2, 16610 Prague 6, Czech Republic