1. 1) Present address: Department of Pharmacology, Faculty of Pharmacy, Doshisha Women's College of Liberal Arts; Kodo, Kyotanabe, Kyoto 610–0395, Japan.
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3. 3) Takagi K., Kasuya Y., Watanabe K., Chem. Pharm. Bull., 12, 465—472 (1964).
4. 4) Takagi K., Okabe S., Jpn. J. Pharmacol., 18, 9—18 (1968).
5. 5) Takagi K., Okabe S., Saziki R., Jpn. J. Pharmacol., 19, 418—426 (1969).