Literature cited
W. Loechel and M. Schenck, U. S. Patent 2, 872, 462, February 3, 1959.
R. M. Dodson and P. B. Soliman, U. S. Patent 2,912,443, Nov. 10, 1959; L. L. Smith and D. M. Teller, J. Medicinal Chem.7, 531 (1964).
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, p. 2087, November 1965