Affiliation: | (1) dept SBM, Limburgs Universitair Centrum, Universitaire Campus, 3610 Diepenbeek, Belgium;(2) Laboratorium voor Systematiek en Ecologie, Naamsestraat 59, 3000 Leuven, Belgium;(3) Department of Chemistry, University of Keele, ST5 5BG Keele, Staffordshire, UK;(4) Present address: Unit of Organic Geochemistry, School of Chemistry, University of Bristol, Bristol, UK |