1. 1) Paper read before the Annual Meeting of the Chemical Society of Japan, in Kyoto, April, 1956.
2. T. Nozoe: Science of Drugs (in Japanese), 3, 188 (1949);
3. Sci. Rep. Tohoku Univ., First Series, 34, 199 (1950). T. Nozoe, Y. Kitahara, K. Doi, and T. Arai: To be published.
4. 3) T. Nozoe, M. Satô, and T. Matsuda: Sci. Rep. Tohoku Univ., First Series, 37, 407 (1953).
5. 4) T. Nozoe, S. Ito, S. Suzuki, and K. Hiraga: Proc. Japan Acad., 32, 344 (1956).