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Constituents of Cupuliferae,XVII: Triterpene Saponins and Falvonoids from Quercus laurifolia Michx. |
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| Authors: | Giovanni Romussi Gabriele Caviglioli Cosimo Pizza Nunziatina de Tommasi |
| Abstract: | In addition to fourteen known glycosides from leaves of Quercus laurifolia Michx., a new acylated triterpene soponin has been isolated and identified as 3-O-galloyl-28-β-D -glucopyranosyl diester of the 2α,3β,19α,23-tetrahydroxyurs-12-ene-28-oic acid ( 1 ). The structure of the previously described α-D -glucopyranosyl ester of the 2α,3β,19α,23-tetrahydroxyurs-12-ene-28-oic acid was revised to β-D -glucopyranosyl ester of the 2α,3β,19α,23-tetrahydroxyurs-12-ene-28-oic acid ( 2 ). |
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