Two New Taxoids from the Leaves and Stems of Taxus chinensis
نویسندگان
چکیده
منابع مشابه
Two new taxoids from the leaves and stems of Taxus chinensis.
Two new taxoids called 7,13-dideacetyl-9,10-debenzoyl-7beta,9alpha-p-hydroxylbenzylidenedioxy-taxchinin C (1) and 7,13-dideacetyl-2,9,10-debenzoyl-2-tigloyl-7beta,9alpha-p-hydroxylbenzylidenedioxy-taxchinin C (2) were isolated from the leaves and stems of Taxus chinensis. They represent the first examples of taxoids containing the 5/7/6-membered ring system with 7beta,9alpha-p-hydroxylbenzylide...
متن کاملSimultaneous identification and determination of major taxoids from extracts of Taxus chinensis cell cultures.
Liquid chromatography electrospray ionization tandem mass spectrometry (LC/ESI-MS/ MS) and high-performance liquid chromatography (HPLC) methods have been used to identify and quantify the major taxoids from extracts of Taxus chinensis cell cultures. Chromatography was carried out on a reverse phase C18 column with isocratic-mode elution. By analytically comparing LC/ESI-MS/MS of the extracts w...
متن کاملEleven new highly oxygenated triterpenoids from the leaves and stems of Schisandra chinensis.
Eleven new triterpenoids, schinchinenins A–H (1–8) and schinchinenlactones A–C (9–11) together with three known triterpenoids, henrischinins A–C (12–14), were isolated from the leaves and stems of Schisandra chinensis by bioassay-guided fractionation. Schinchinenin A (1) is the first example of a highly oxygenated triterpenoid characterized by a 5/5/7/6/5-fused pentacyclic ring and a 3-one-2-ox...
متن کاملTwo New Triterpenoid Glycosides from Leaves of Hex chinensis SIMS1)
Two new triterpenoid glycosides were isolated (one of them as the methyl ester) as major components from leaves of Ilex chinensis Sims (Aquifoliaceae) . The structures of these glycosides, termed ilexoside A (1) and ilexoside B methyl ester (2a), have been established to be 3ƒÀ-ƒ-(ƒÀ-Dxylopyranosyl)siaresinolic acid and 3ƒÀ-ƒ-(ƒÀ-D-xylopyranosyl)pomolic acid methyl ester , respectively, based o...
متن کاملNew Lignans from the Leaves and Stems of Kadsura philippinensis.
Three novel C19 homolignans, taiwankadsurins D (1), E (2) and F (4), and two new C18 lignans kadsuphilins N (3) and O (5) were isolated from the aerial parts of Taiwanese medicinal plant Kadsura philippinensis. The structures of compounds 1-5 were determined by spectroscopic analyses, especially 2D NMR techniques. The structure of compound 5 was further confirmed by X-ray crystallographic analy...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 2009
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.57.1008