Institution: | (1) Division of Pharmacognosy, Leiden/Amsterdam Center for Drug Research, Leiden University, P.O Box 9502, 2300 RA Leiden, The Netherlands;(2) Present address: Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 540 06 Thessaloniki, Greece;(3) Present address: Department of Phytopathology, Wageningen Agricultural University, Binnenhaven 9, 6709 PD Wageningen, The Netherlands |