1. Laboratory of Bioorganic Chemistry, National Institute of Diabetes, and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0820
2. Shimadzu Corporation, Hadano, Kanagawa 2591304, Japan
3. Toyo Polymer Co., Ltd., Suita, Osaka 5640044, Japan
4. Faculty of Science, Osaka City University, Osaka, 585, Japan
5. University of Puerto Rico, Department of Biology, P.O. Box 23360, San Juan, Puerto Rico 00931-3360, and International Institute of Tropical Forestry, USDA Forest Service, Call Box 25000, Río Piedras 00928-2500, Puerto Rico
6. Los Angeles County Museum of Natural History, 900 Exposition Boulevard, Los Angeles, California 90007
7. Department of Chemistry, Virginia Military Institute, Lexington, Virginia 24450-0304