1. Dictionary of Organic Compounds, 5th edn., Chapman and Hall, New York (1982), Vol. 3, pp. 3368 (a), 3363 (b).
2. T. Ishihara, T. Kitahara, and M. Matsui, Agric. Biol. Chem.,38, 439 (1974).
3. H. Favre and H. Schinz, Helv. Chim. Acta,35, 1627 (1952).
4. S. Torii, K. Uneyama, and S. Matsunami, J. Org. Chem.,45, 16 (1980); T. Mandai, K. Nishikawa, H. Yanmaguchi, et al., Chem. Lett., 473 (1981).
5. V. V. Veselovskii, V. A. Dragan, and A. M. Moiseenkov, Izv. Akad. Nauk SSSR, Ser. Khim., 2787 (1987).