1. Natural
Products Laboratory, Institute of Biology, Leiden University, Sylviusweg
72, Leiden, 2333 BE, The Netherlands
2. Research
Department of Pharmaceutical and Biological Chemistry, UCL School of Pharmacy, 29-39 Brunswick Square, London, WC1N 1AX, United Kingdom
3. Department
of Organic Chemistry, Institute of Chemistry, São Paulo State University, Prof. Francisco Degni 55, Araraquara, 14800-900, Brazil
4. NMR
Facility, Leiden Institute of Chemistry, Leiden University, Einsteinweg
55, Leiden, 2333 CC, The Netherlands
5. Division
of Pharmaceutical Biology, University of Basel, Klingelbergstrasse
50, Basel, CH-4056, Switzerland
6. Section
of Plant Physiology and Biochemistry, Institute of Botany, São Paulo, 01061-970, Brazil