1. Organic Chemistry Laboratory, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 136-791, Korea, Department of Chemistry, Kyonggi University, Suwon 442-760, Korea, PrimeSyn Laboratories, Inc., 9 Ilene Court, Building 6, Units 1 and 2, Hillsborough, New Jersey 08844, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, Pennsylvania 19111, Department of Chemistry, Kent...