Affiliation: | Central Research Laboratory, Mitsubishi Petrochemical Co., Ami-machi, Inashiki-gun, Ibaraki 300-03 Japan;Faculty of Pharmaceutical Sciences, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113 Japan;Central Research Laboratory, Mitsubishi Petrochemical Co., Ami-machi, Inashiki-gun, Ibaraki 300-03 Japan;Faculty of Pharmaceutical Sciences, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113 Japan |