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verbenalin/verbena
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7 resultados
Simultaneous quantification of verbenalin and verbascoside in Verbena officinalis by ATR-IR and NIR spectroscopy.
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Attenuated-total-reflectance infrared spectroscopy (ATR-IR) and near-infrared diffuse reflectance spectroscopy (NIR) in hyphenation with multivariate analysis was utilized to quantify verbenalin and verbascoside in Verbena officinalis. A new high performance liquid chromatography (HPLC) method as a
[Studies on the chemical constitutents in herb of Verbena officinalis].
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OBJECTIVE
To isolate and identify the chemical constituents from Verbena officinalis.
METHODS
The compounds were isolated by means of chromatography and the structures were determined on the basis of physical and spectral analysis.
RESULTS
Four compounds were isolated and identified as apigenin (I),
Two new iridoids from Verbena officinalis L.
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Two new iridoids, 3-(5-(methoxycarbonyl)-2-oxo-2H-pyran-3-yl)butanoic acid, named verbeofflin I (1), and 7-hydroxydehydrohastatoside (2), were isolated from the aerial part of Verbena officinalis L, along with three known iridoids, verbenalin (3), 3,4-dihydroverbenalin (4), hastatoside (5) by means
HPLC-DAD-ESI-MS analysis of the constituents of aqueous preparations of verbena and lemon verbena and evaluation of the antioxidant activity.
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Verbena and lemon verbena aqueous preparations were investigated for their content of constituents, especially polyphenols by HPLC/DAD/ESI/MS analysis because they are used worldwide as herbal teas. The main class of compounds of these plants were phenylpropanoids (from 16 to 120 mg/g of dried
Towards eco-friendly secondary plant metabolite quantitation: ultra-high performance supercritical fluid chromatography applied to common vervain (Verbena officinalis L.).
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This report presents the first ultra-high performance supercritical fluid chromatography diode array detector based assay for simultaneous determination of iridoid glucosides, flavonoid glucuronides, and phenylpropanoid glycosides in Verbena officinalis (Verbenaceae) extracts. Separation of the key
Application of benchtop and portable near-infrared spectrometers for predicting the optimum harvest time of Verbena officinalis.
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This study examined the applicability of near-infrared (NIR) spectroscopy coupled with multivariate data analysis (MVA) to determine the ideal harvest time of Verbena officinalis. NIR analyses were performed non-invasively on the fresh plant material based on the quantification of the key
Antiinflammatory activity and chemical composition of extracts of Verbena officinalis.
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In an attempt to locate the biologically active fraction(s) of the plant Verbena officinalis Linn. (Verbenaceae), a preliminary screening of successive petroleum ether, chloroform and methanol extracts of aerial parts for antiinflammatory activity using carrageenan paw oedema model was carried out.
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