1. Department of Pharmacognosy, School of Pharmacy, University of Oslo, P.O. Box 1068, Blindern, 0316 Oslo, Norway, Kitasato Institute for Life Sciences, Kitasato University and Oriental Medicine Research Center, 5-9-1 Shirokane, Minato-ku, Tokyo 108, Japan, Department of Chemistry, University of York, Heslington, YO10 5DD, United Kingdom, The Norwegian Institute of Public Health, Division of Infectious Disease Control, P.O. Box 4404, Nydalen, 0403 Oslo, Norway, National Centre for Macromolecular...