1. L. F. Tietze, Сhеm. Rev., 96, 115 (1996).
2. Т. Нudlicky, Сhеm. Rеv., 96, 3 (1996).
3. O. V. Yashkanova, O. E. Nasakin, Yu. G. Urman, V. N. Khrustalev, V. N. Nesterov, M. Yu. Antipin, P. M. Lukin, and E. V. Vershinin, Zh. Org. Khim., 33, 542 (1997).
4. Y. Takeuchi, Т. Choshi, H. Tomozane, H. Yoshida, and M. Yamato, Chem. Pharm. Bull., 38, 2265 (1990).
5. J. Chakrabarti, R. Eggleton, P. Gallagher, and J. Harvey, J. Med. Chem., 30, 1663 (1987).