ISSN:
1573-8388
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract From the unsaponifiable fraction of an ethereal extract of the leaves ofBetula ovalifolia have been isolated the new triterpene 20(S),24(R)-epoxydammarane-3α,17α,25-triol (V) and the corresponding monoketone at C3 (VI). The leaves ofB. middendorfii have yielded the triterpene (IX) and (X), identified as, respectively, dammar-23-ene-3α,12β,20(S),25-tetraol and damman-25-ene-3α,12β,20-(S),24-tetraol, which have been obtained previously from the leaves ofBetula platyphylla Sukatchev var.japonica.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00568512
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