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kaempferol/hibiscus
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3 resultater
Polyphenolic compounds from flowers of Hibiscus rosa-sinensis Linn. and their inhibitory effect on alkaline phosphatase enzyme activity in vitro.
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Graded concentrations (0.1-100 mg/mL reaction mixture) of the methanolic extract of the flowers of Hibiscus rosa-sinensis Linn., its water-soluble fraction as well as compounds isolated from this fraction were tested for their inhibitory effect on alkaline phosphatase enzyme activity in vitro. Both
[Chemical Constituents from Leaves of Hibiscus syriacus and Their α-Glucosidase Inhibitory Activities].
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OBJECTIVE
To study the chemical constituents from Hibiscus syriacus leaves and their α-glucosidase inhibitory activities.
METHODS
Column chromatography including macroporous resins, silica gel and Sephadex LH-20 were used for the isolation and purification of all compounds. Spectroscopic methods
Isolation of methyl 27-caffeoyloxyoleanolate--a new oleanane Triterpenoid from the roots of Hibiscus vitifolius.
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A new oleanane triterpenoid, methyl 27-caffeoyloxyoleanolate (2), together with eight known compounds viz. oleanolic acid, kaempferol, quercetin, beta-sitosterol-3-O-beta-D-glucopyranoside, kaempferol-3-O-alpha-D-rhamnopyranoside, gossypin, quercetin-3-O-beta-D-glucopyranoside and mangiferin were
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