... Found: C, 51.40; H, 3.01; N, 9.29. REFERENCES AND NOTES [1] Biomedicinal Aspects of Fluorine Chemistry, R. Filler and Y. Kobayashi, eds, Kodansha and Eiseier Biomedical, Tokyo and Amster- dam, 1982. ... Heterocyclic Chem., 27. ... [4] M. Begtrup and H. P. Nytoft, J. Chem. ...