1. T. Shimamoto, Asian Med. J.,10, 425 (1967).
2. G. Ya. Shvarts and M. D. Mashkovskii, Farmakol. Toksikol., No. 2, 176 (1976).
3. G. Ya. Shvarts, Khim.-Farm. Zh., No. 11, 139 (1977).
4. J. Bade, et al., Ther. Hung.,24, 91 (1976).
5. W. Mathes, W. Sauermilch, and J. Klein, Chem. Ber.,86, 58 (1953).