1. 1) T. Nozoe: Bull. Chem. Soc. Japan, 11, 295 (1936).
2. 2) Nozoe and Katsura: J. Pharm. Soc., Japan, 64, 181 (1944). This was reported at the Annual Meeting of the Pharm. Soc., Japan in April 1942, in Tokyo.
3. 3) Nozoe: Science of Drugs, 3, 174 (1949). Review of the work performed at Taihoku Imp. Univ. (Japan) and at National Taiwan Univ. (China) from 1936 to April. 1948. Details to be published in the near future.
4. 4) Details of this could not be published until the end of 1948 owing to the delayed repatriation from Formosa. The resonance structure (II), however, was published by the authors' collaborator in medical field, Dr. S. Katsura [cf. Saishin Igaku: 2, 595 (1947)].
5. 5) Nozoe et al: The Proceedings: 26 (No. 8), (No. 9), (No. 10), (1950).