Summary
From the unsaponifiable fraction of an ethereal extract of the leaves ofBetula ermanii a new triterpene of the dammarane series — 20,24-epoxydammarane-3β,6α,25-trol (II) — and its 6-O-acetyl derivative (I) have been isolated.
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N. I. Uvarova, G. V. Malinovskaya, and G. B. Elyakov, Tetrahedron Lett., 4617 (1976).
M. Nagai, N. Tanaka, O. Tanaka, and S. Ichikawa, Chem. Pharm. Bull.,21, 2061 (1973).
M. Nagai, N. Tanaka, S. Ichikawa, and O. Tanaka, Tetrahedron Lett., 4239 (1968).
J. Asakawa, R. Kasai, K. Yamasaki, and O. Tanaka, Tetrahedron,33, 1935 (1977).
H. Eggert, C. L. Van Antwerp, N. S. Bhacca, and C. Djerassi, J. Org. Chem.,41, 71 (1976).
S. A. Knight, Org. Magn. Res.,6, 603 (1974).
S. Huneck, Chem. Ber.,94, 614, 1151 (1961).
S. Shibata, O. Tanaka, K. Soma, Y. Iida, T. Ando, and H. Nakamura, Tetrahedron Lett., 207 (1965).
F. C. Fischer and N. Seiler, Lieb. Ann. Chem.,626, 185 (1959).
Additional information
Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Scientific Center of the Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 587–590, September–October, 1978.
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Malinovskaya, G.V., Pokhilo, N.D., Isakov, V.V. et al. Triterpenes from the leaves ofBetula ermanii . Chem Nat Compd 14, 504–507 (1978). https://doi.org/10.1007/BF00567141
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DOI: https://doi.org/10.1007/BF00567141