Institution: | 1. Faculty of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565, Japan;2. Faculty of Pharmaceutical Sciences, Setsunan University, Hirakata, Osaka 573-01, Japan;3. Takasago Corporation, Kamata, Ohta-ku, Tokyo 144, Japan;4. Laboratories of Natural Product Chemistry, Otsuka Pharmaceutical Co. Ltd., Kawauchi-cho, Tokushima 771-01, Japan |