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I. V. Nechepurenko N. I. Komarova Yu. V. Gerasimova V. V. Koval′ M. P. Polovinka D. V. Korchagina N. F. Salakhutdinov 《Chemistry of Natural Compounds》2009,45(1):32-39
Oligomeric proanthocyanidines from Hedysarum theinum roots that were cleaved by benzylmercaptan were shown to be heterogeneous
mixtures consisting of prodelphinine and procyanidine structural units with the former dominating. Fractionation of oligomeric
proanthocyanidines on polyamide and MCI gel CHP20P sorbent isolated fractions containing primarily mixtures of di- and trimeric,
tri- and tetrameric, or tetra- and pentameric proanthocyanidines. Analysis by mass spectrometry (MALDI-TOF) showed that fractions
of trimers and tetramers contained more proanthocyanidines with a single A-type bond than fractions of dimers and trimers.
Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 30–36, January–February, 2009. 相似文献
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Two dimeric proanthocyanidines identified as 2R,3R,4R-(-)-epigallocatechin-(4β→ 8)-2R,3R-(-)-epigallocatechin-3-O-gallate and 2R,3R,4R-(-)-epigallocatechin-(4β→8)-(-)-2R,3R,3,5,7,3′,4′,6′-hexahydroxyflavan were isolated by adsorption chromatography over polyamide of the ethylacetate fraction of
the aqueous alcohol extract of Limonium gmelinii roots. The former proanthocyanidine was isolated for the first time from sea lavender whereas the latter is new.
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Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 134–138, March–April, 2006. 相似文献
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