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Isolation of Stigmasterol and β-Sitosterol from the dichloromethane extract of Rubus suavissimus
Purification of the dichloromethane (CH2Cl2) fraction of the aqueous extract of Rubus suavissimus resulted in the isolation of two sterols namely stigmasterol and β-sitosterol. The structures of theExpand
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The aroma, taste, color and bioactive constituents of tea
The genus Camellia sinensis belongs to the family of Theaceae of the flowering plants. The leaves and leaf buds of C. sinensis are used to produce tea. The chemical composition of tea leaves has beenExpand
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Flavonoids from Astragalus propinquus
Systematic phytochemical studies of the dichloromet hane (CH2Cl2) fraction of the aqueous extract of Astragalus propinquus on a C-18 column using a Biotage Flash C hromatography system yielded threeExpand
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Two new triterpene esters from the twigs of Brachylaena ramiflora from the Madagascar rainforest.
Bioassay-guided fractionation of a CH(2)Cl(2)/MeOH extract of the small twigs of Brachylaena ramiflora var. ramiflora resulted in the isolation of the two new triterpene esters 1 and 2 and five knownExpand
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New cytotoxic oleanane saponins from the infructescences of Polyscias amplifolia from the Madagascar rainforest.
Bioassay-guided fractionation of an ethanolic extract of the infructescences of Polyscias amplifolia resulted in the isolation of two new oleanolic acid saponins, polyfoliolides A (1) and B (2), inExpand
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New cytotoxic coumarins and prenylated benzophenone derivatives from the bark of Ochrocarpos punctatus from the Madagascar rainforest.
Bioassay-guided fractionation of a CH2Cl2-MeOH extract of the bark of Ochrocarpos punctatus resulted in the isolation of seven new coumarins, ochrocarpins A-G (1-7), three new benzophenoneExpand
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New lupane triterpenoids from Solidago canadensis that inhibit the lyase activity of DNA polymerase beta.
Bioassay-directed fractionation of a methyl ethyl ketone extract of Solidago canadensis L. (Asteraceae), using an assay to detect the lyase activity of DNA polymerase beta, resulted in the isolationExpand
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A New Diterpene Glycoside from Stevia rebaudiana
From the commercial extract of the leaves of Stevia rebaudiana, a new diterpene glycoside was isolated besides the known steviol glycosides including stevioside, rebaudiosides A-F, rubusoside andExpand
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Minor diterpenoid glycosides from the leaves of Stevia rebaudiana
From the commercial extract of the leaves of Stevia rebaudiana, three new diterpenoid glycosides were isolated besides eight known steviol glycosides including stevioside, rebaudiosides A–F andExpand
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Additional Minor Diterpene Glycosides from Stevia rebaudiana
From the commercial extract of the leaves of Stevia rebaudiana, two additional new diterpenoid glycosides were isolated and their structures were characterized asExpand
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