daphnoretin and genkwanin

A sensitive, rapid and simple ultra high performance liquid chromatography with electrospray ionization tandem mass spectrometry method was developed to determine seven constituents (umbelliferone, apigenin, triumbelletin, daphnoretin, arctigenin, genkwanin and emodin) in Wikstroemia indica (L.) C. A. Mey. The chromatographic analysis was performed on an ACQUITY UPLC® BEH C18 column (2.1 × 50 mm, 1.7 μm) by gradient elution with the mobile phase of 0.05% formic acid aqueous solution (A) and acetonitrile (B). Multiple reaction monitoring mode with positive and negative electrospray ionization interface was carried out to detect the components. This method was validated in terms of specificity, linearity, accuracy, precision and stability. Excellent linear behavior was observed over the certain concentration ranges with the correlation coefficient values higher than 0.999. The intraday and innerday precisions were within 2.0%. The recoveries of seven analytes were 99.4-101.1% with relative standard deviation less than 1.2%. The 18 Wikstroemia indica samples from different origins were classified by hierarchical clustering analysis according to the contents of seven components. The results demonstrated that the developed method could successfully be used to quantify simultaneously of seven components in Wikstroemia indica and could be a helpful tool for the detection and confirmation of the quality of traditional Chinese medicines.

Topics: Apigenin; Chromatography, High Pressure Liquid; Cluster Analysis; Coumarins; Emodin; Flavones; Furans; Geography; Lignans; Medicine, Chinese Traditional; Plant Extracts; Reproducibility of Results; Sensitivity and Specificity; Spectrometry, Mass, Electrospray Ionization; Umbelliferones; Wikstroemia

To study the chemical constituents of the flower buds of Daphne genkwa.. The constituents of petroleum ether and ethyl acetate-soluble portions were isolated and purified by means of chromatography, then they were identified by their physico-chemical characteristics and spectral features.. Ten compounds were isolated and identified as octacosane (1), dotriacontane (2), beta-sitosterol (3), 4', 7-dimethoxy-5-hydroxyflovone (4), aurantiamide acetate (5), genkwanin (6), luteolin (7), apigenin (8), 3'-hydroxygenkwanin (9) and daphnoretin (10).. Compound 1 and 2 are isolated from this plant for the first time.

Topics: Alkanes; Apigenin; Coumarins; Daphne; Diacetyl; Dipeptides; Flavones; Flowers; Luteolin; Molecular Structure; Plants, Medicinal; Sitosterols

To study the chemical constituents from Daphne odora var. atrocaulis.. The chemical constituents were isolated and repeatedly purified by silica gel column chromatography and the structures were elucidated by the NMR spectra and physicochemical properties.. Sixteen compounds were obtained and nine of them were identified as beta-sitosterol, 4-hydroxy ethylbenzoate, (2E),-2-propenoic acid,3-(3,4-dihydroxyphenyl)-decosylester, genkwanin, 2,4-dihydroxypyrimidine, daphnetin, daphnoretin, 5,7,4'-trihydroxyflavone-3ol, daucosterol.. Seven compounds were obtained from D. odora var. atrocaulis. for the first time.

Topics: Coumarins; Daphne; Flavones; Plant Roots; Plants, Medicinal; Umbelliferones