Terpenoid and other extractives of western white pine bark |
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Authors: | Anthony H. Conner Bhimsen A. Nagasampagi John W. Rowe |
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Affiliation: | Forest Products Laboratory, U.S. Department of Agriculture, Madison, WI 53705, U.S.A.;Forest Service, U.S. Department of Agriculture, Madison, WI 53705, U.S.A. |
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Abstract: | A detailed chemical analysis of the benzene extract of western white pine bark was conducted. The extract consisted of 13% phlobaphenes, 18% strong acids, 21% polar weak acids, 6.5% fatty acids, 9.5% resin acids, and 32% neutrals. The fatty acids consisted mainly of C20:0, C22:0, and C24:0 acids. The resin acids were identified as: isopimaric, anticopalic, dehydroabietic, sandaracopimaric, abietic, 6,8,11,13-abietatetraen-18-oic and pimaric acids. The neutrals on saponification gave fatty acids, sterols, wax alcohols, nonsaponifiables, and other components. The esterified fatty acids consisted primarily of the C16:0, C18:0, C20:0 and C24:0 acids. The sterols included major amounts of sitosterol, campesterol, and stigmasterol, and traces of cholesterol. Over 70 individual compounds were isolated and identified from the nonsaponifiables. These included borneol, sesquiterpenes, diterpenes, steroidal ketones, as well as lanostane and serratane triterpenes. The characterization of12 new natural products or natural products isolated for the first time from Pinus species is reported. |
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Keywords: | Pinaceae western white pine bark extractives resin acids triterpenes sterols fatty acids. |
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