1. 1) Paper read before the Tohoku Local Meeting of the Chemical Society of Japan in Sendai, December 7, 1953. A part of this paper was read before the 6th Annual Meeting of the Chemical Society of Japan in Kyoto, April 5, 1953.
2. T. Nozoe: Science of Drugs, 3, 191 (1949);
3. Sci. Repts. Tohoku Univ., First Series, 34, 225 (1950).
4. 3) T. Nozoe, T. Mukai, K. Takase, I. Murata, and K. Matsumoto: Proc. Japan Acad., 29, 452 (1953).
5. 4) T. Nozoe and S. Seto: Proc. Japan Acad., 27, 188 (1951).