1. Photoreaction Control Research Center (PCRC), National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan, Faculty of Science and Technology, Science University of Tokyo, Yamazaki 2641, Noda, Chiba 278-8514, Japan, and Hayashibara Biochemical Laboratories, Inc., Fujita 564-176, Okayama 701-0221, Japan