Institution: | a Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Isotope Laboratory, Vídeňská 1083, 14220, Prague 4, Czech Republic b Institute of Chemical Technology Prague, Department of Chemistry of Natural Compounds, Technická 5, 16028, Prague 6, Czech Republic c University of Jyväskylä, Department of Chemistry, Laboratory of Organic Chemistry, P.O. Box 35, FI-40014, University of Jyväskylä, Finland d Biological Center, Institute of Entomology, Academy of Sciences of the Czech Republic, Branišovská 31, 37005 ?eské Budějovice, Czech Republic |