Entity

Time filter

Source Type


Qiu L.,Guangxi Medical University | Jiao Y.,Guangxi Medical University | Xie J.-Z.,Guangxi Medical University | Huang G.-K.,Guangxi Medical University | And 3 more authors.
Journal of Asian Natural Products Research | Year: 2013

Five new flavonoid glycosides, namely nervilifordins F-J (1-5), were isolated from the 60% EtOH extract of the aerial parts of Nervilia fordii, along with three first isolated flavonoids (7, 8, and 13) and five known flavonoids (6, 9-12). The structures of new compounds were elucidated on the basis of 1D and 2D NMR and MS studies. Their anti-inflammatory activities were tested by measuring their inhibitory effects on nitric oxide production in lipopolysaccharide-activated RAW264.7 macrophages. Compounds 2 and 5 showed interesting inhibition effects with their EC50 values of 15.15 μM and 14.80 μM, respectively. © 2013 Copyright Taylor and Francis Group, LLC. Source


Zhou X.-L.,Institute of Guangxi Medicinal Plant | Yuan J.-Q.,Institute of Guangxi Medicinal Plant | Yuan J.-Q.,Jinan University | Fan X.-Y.,Institute of Guangxi Medicinal Plant | And 4 more authors.
Chinese Journal of New Drugs | Year: 2013

Objective: To establish the quality standard of rheumatism ostalgia spray III. Methods: TLC was used in qualitative identification of Gelsemium elegans (Gardn. et Champ.) Benth. And HPLC was used for the assay of koumine in the preparation. Results: Gelsemium elegans (Gardn. et Champ.) Benth could be detected by TLC. The calibration curve of koumine had good linearity within the range of 0.199 2~3.187 μg. The average recovery was 98.58% and the RSD was 1.41%. Conclusion: The method is stable and reliable. It can be used for the quality control of rheumatism ostalgia spray III. Source


Qiu L.,Jinan University | Qiu L.,Institute of Guangxi Medicinal Plant | Qiu L.,Guangxi Medical University | Jiao Y.,Guangxi Medical University | And 4 more authors.
Helvetica Chimica Acta | Year: 2014

Three new dammarane-type triterpenoid saponins, 1-3, were isolated and identified as (20S)-20-O-[β-D-xylopyranosyl-(1→6)-β-D- glucopyranosyl-(1→6)-β-D-glucopyranosyl]dammar-24-ene-3β, 6α,12β, 20-tetrol (1), (20S)-6-O-[(E)-but-2-enoyl-(1→6)-β- D-glucopyranosyl]dammar-24-ene-3β,6α,12β,20-tetrol (2), and (20S)-6-O-[β-D-xylopyranosyl-(1→2)-β-D-xylopyranosyl] dammar-24-ene-3β,6α,12β,20-tetrol (3) from the roots of Panax notoginseng (Burkill) F.H.Chen (Araliaceae). Their structures were elucidated on the basis of spectroscopic analyses, including 1D- and 2D-NMR techniques and HR-ESI-MS, as well as by acidic hydrolysis. Copyright © 2014 Verlag Helvetica Chimica Acta AG, Zürich. Source


Yang X.,Institute of Guangxi Medicinal Plant | Miao J.,Institute of Guangxi Medicinal Plant | Ma X.,Chinese Academy of Sciences | Xiao P.,Peking Union Medical College
Journal of AOAC International | Year: 2013

Semen Oroxyli is a medicinal plant widely used in traditional Chinese medicine. In this study, an improved and comprehensive analytical method suitable for QC of Semen Oroxyli was optimized and fully validated according to International Conference on Harmonization guidelines in terms of linearity, precision, and accuracy. With this method, four flavonoids in Semen Oroxyli plant material were simultaneously quantitatively analyzed for the first time. The sample treatment procedure and HPLC conditions were investigated and optimized. HPLC separation was carried out on a C18 column; the detection wavelength was set at 280 nm. The mobile phase was a two-phase system consisting of water, acetic acid, and acetonitrile using a linear gradient. The RSDs within levels and between levels, as well as within and between days, were less than the acceptance limit of 5% for the tested analytes. The mean recoveries of the four marker constituents were, respectively, 99.60, 101.8, 98.84, and 102.9%, with no significant difference from 100%. The validation data showed the developed method was suitable for the QC of the Semen Oroxyli plant material and products thereof. Source


Yuan J.-Q.,Jinan University | Yuan J.-Q.,Institute of Guangxi Medicinal Plant | Qiu L.,Guangxi Medical University | Zou L.-H.,Guangxi Medical University | And 3 more authors.
Helvetica Chimica Acta | Year: 2015

Two new phenylethanoid glycosides, longissimosides A and B (1 and 2, resp.), together with eight structurally related known compounds, were isolated from the EtOH extract of leaves and stems of Callicarpa longissima (Hemsl.) Merr. The structures of 1 and 2 were elucidated as 2-(3,4-dihydroxyphenyl)ethyl O-(α-L-rhamnopyranosyl)-(1→3)-O-(2-O-syringoyl-β-D-xylopyranosyl)-(1→6)- 4-O-[(E)-caffeoyl]-β-D-glucopyranoside (1) and 2-(3-hydroxy-4-methoxyphenyl)ethyl O-(α-L-rhamnopyranosyl)-(1→3)-O-(β-D-apiofuranosyl)-(1→6)-4-O-[(E)-isoferuloyl]-β-D-glucopyranoside (2) on the basis of spectroscopic data and acid hydrolysis. Copyright © 2015 Verlag Helvetica Chimica Acta AG, Zürich. Source

Discover hidden collaborations