1. Faculty of Pharmaceutical Sciences, Hokuriku University, Kanazawa 920-11, Japan, Department of Japanese Oriental Medicine, Faculty of Medicine, Toyama Medical and Pharmaceutical University, Toyama 930-01, Japan, Division of Human Retroviruses, Center for Chronic Viral Diseases, Faculty of Medicine, Kagoshima University, Kagoshima 890, Japan, Institute of Grassland and Environmental Research, Aberystwyth, Cardiganshire SY23 3EB, U.K., Chemical Crystallography Institute, Oxford University, Oxford OX1 3PD,...