Triterpenes from the Outer Bark ofBetula nigra
- 1 December 1991
- journal article
- research article
- Published by Taylor & Francis in Journal of Wood Chemistry and Technology
- Vol. 11 (4) , 503-516
- https://doi.org/10.1080/02773819108051090
Abstract
Twelve pentacyclic triterpenes were isolated from the outer bark of river birch, Betula nigra. 3β-Acetoxyolean-11-oxo-12-ene-28-oic acid was isolated for the first time from a Betula species. 3β-Caffeatoxyolean-12-ene-28-oic acid has been spectrally characterized for the first time. 3β-Acetoxyolean-12-ene-28-oic acid and 3β-acetoxyolean-11-oxo-12-ene-28-oic acid have been demonstrated to be active as antifeedants for the Colorado potato beetle, Leptinotarsa decemlineata.Keywords
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