Triterpene glycosides of Gleditschia triacanthos V. Structure of triacanthoside C and the minor glycosides
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The complete structure of the triterpene glycoside triacanthoside C (I) isolated from the pericarps of the honeylocust,Gleditschia triacanthos L. (family Leguminosae) has been established as a hexaoside of oleanolic acid.
From the green pods of the honeylocust, in addition to the ten triacanthosides described previously, oleanolic and echinocystic acids have been isolated, and also five other triterpene glycosides-gleditschosides A, B, C, D, and E. Gleditschoside A, C36H58O8, is oleanolic acid β-D-glucopyranoside (VII), gleditschoside B, C36H58O9 is echinocystic acid β-D-glucopyranoside (VIII), gleditschoside C, C41H66O12, is oleanolic acid 3-O-[α-L-arabinopyranosyl-(1→3)-O-β-D-glucopyranoside] (V), gleditschoside E, C41H66O13, is echinocystic acid 3-O-[α-L-arabinopyranosyl-(1→3)-O-β-D-glucopyranoside] (VI), and gleditschoside D, C46H74O16, is oleanolic acid 3-O-[β-D-xylopyranosyl-(1→4)-O-α-L-arabopyranosyl-(1→3)-O-β-D-glucopyranoside]. Gleditschosides A, B, C, D, and E have also been detected in the leaves of the plant.
KeywordsGlycoside Oleanolic Acid Methyl Ethyl Ketone Triterpene Glycoside Butanolic Extract
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