1. G. Lancini and F. Parenti,Antibiotics, Springer, New York (1982).
2. E. C. Taylor and R. W. Hendess,J. Am. Chem. Soc.
86(5), 951–952 (1964).
3. O. E. Nasakin, V. V. Alekseev, V. K. Promonenkov, et al.,Khim. Geterotsikl. Soedin., No. 3, 402–403 (1981).
4. O. E. Nasakin, V. V. Alekseev, P. B. Terent'ev, et al.,Khim. Geterotsikl. Soedin., No. 8, 1062–1066 (1983).
5. O. E. Nasakin, V. V. Alekseev, P. B. Terent'ev, et al.,Khim. Geterotsikl. Soedin., No. 8, 1076–1080 (1983).