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Bidesmosidic Oleanane Saponins from Xerospermum noronhianum
Author(s) -
Jean Tan Pei,
Shaari Khozirah,
Paetz Christian,
Ismail Intan Safinar,
Abas Faridah,
Lajis Nordin H.,
Ahmad Viqar Uddin
Publication year - 2009
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200900063
Subject(s) - oleanane , chemistry , oleanolic acid , triterpenoid , saponin , stereochemistry , terpene , triterpene , medicine , alternative medicine , pathology
Three new oleanane‐type triterpenoid saponins, 3‐ O ‐( α ‐ L ‐rhamnopyranosyl(1→2)‐ β ‐ D ‐fucopyranosyl)‐28‐ O ‐{[ α ‐ L ‐rhamnopyranosyl(1→2)] [ β ‐ D ‐fucopyranosyl(1→6)]‐ β ‐ D ‐glucopyranosyl} oleanolic acid ( 1 ), 3‐ O ‐[ α ‐ L ‐rhamnopyranosyl(1→3)‐ β ‐ D ‐fucopyranosyl]‐28‐ O ‐[ α ‐ L ‐rhamnopyranosyl(1→4)‐ β ‐ D ‐glucopyranosyl] oleanolic acid ( 2 ), and 3‐ O ‐{ α ‐ L ‐rhamnopyranosyl(1→2)‐[3′,4′‐diacetoxy‐ β ‐ D ‐fucopyranosyl]}‐28‐ O ‐[ α ‐ L ‐rhamnopyranosyl(1→2)‐ β ‐ D ‐glucopyranosyl] oleanolic acid ( 3 ) have been isolated from the stems of Xerospermum noronhianum. The structures of the saponins were determined as a series of bidesmosidic oleanane saponins based on spectral evidence. The anticholinesterase activity of the saponins 1 – 3 was also evaluated.