Showing 1-12 of 12 results for "80533"
Solution to spectroscopy challenge 10.
Reinhard Meusinger
Analytical and bioanalytical chemistry, 384(5), 1027-1028 (2006-02-17)
Sheng-Jun Dai et al.
Journal of Asian natural products research, 7(4), 681-685 (2005-08-10)
A new compound, (2R)-4-phenyl-2-O-[beta-D-xylopyranosyl(1-->6)-beta-D-glucopyranosyl]butane (1), has been isolated from the aerial parts of Rhododendren anthopogonoides, together with two known compounds, fraxin (2), and lyoniside (3). Their structures were determined by means of physico-chemical evidence and spectral analyses, including UV, IR...
Wan Kyunn Whang et al.
Experimental & molecular medicine, 37(5), 436-446 (2005-11-03)
Coumarins comprise a group of natural phenolic compounds found in a variety of plant sources. In view of the established low toxicity, relative cheapness, presence in the diet and occurrence in various herbal remedies of coumarins, it appears prudent to...
Takaaki Yasuda et al.
Journal of natural products, 69(5), 755-757 (2006-05-27)
Naturally occurring fraxin (1) was administered orally to rats to investigate its metabolism. Urinary metabolites were analyzed by three-dimensional HPLC, and fraxetin-7-O-sulfate (2), fraxetin-7-O-beta-glucuronide (3), fraxetin (4), 6,7,8-trihydroxycoumarin (5), and fraxidin (6) were isolated. Fraxin (1) was extensively metabolized to...
Cunhong Li et al.
Biomedical chromatography : BMC, 19(9), 696-702 (2005-04-14)
A non-aqueous capillary electrophoresis method has been developed for the separation and simultaneous determination of fraxin, esculin and esculetin in Cortex fraxini and its preparation for the first time. Optimum separation of the analytes was obtained on a 47 cm...
Sheng Lin et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 33(14), 1708-1710 (2008-10-10)
To investigate the chemical constituents from the branch of Fraxinus sieboldiana, and evaluate their antioxidative activity. The chemical constituents were isolated and purified by chromatographic techniques over silica gel, macroporous adsorbent resin, Sephadex LH-20, and preparative HPLC. Structures of the...
Weihong Feng et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 36(13), 1782-1789 (2011-10-29)
To establish a new quantitative method for simultaneous determination of multi-coumarins in Fraxini Cortex by using one chemical reference substance, and validate its feasibilities. The new quality evaluation method, quantitative analysis of multi-components by singer-marker (QAMS), was established and validated...
Hyoung Ja Kim et al.
Planta medica, 68(11), 1034-1036 (2002-11-27)
By means of HIV gp41 binding affinity directed chromatographic fractionation, three phenylethanoid glycosides; calceolarioside A ( 1), calceolarioside B ( 2) and acteoside ( 3), along with four hydroxycoumarins; esculin ( 4), fraxin ( 5), fraxetin ( 6) and esculetin...
S Riva et al.
Carbohydrate research, 305(3-4), 525-531 (1998-07-02)
The influence of various organic cosolvents on the stability and activity of the beta-1,4-galactosyltransferase from bovine colostrum (GalT) and of its ancillary enzyme UDP-galactose-4'-epimerase has been investigated using the glucosylated alkaloid colchicoside (1) as a model substrate. It has been...
Xian Ding et al.
Journal of medical microbiology, 60(Pt 12), 1827-1834 (2011-08-20)
The objective of this study was to screen for novel quorum-sensing inhibitors (QSIs) from traditional Chinese medicines (TCMs) that inhibit bacterial biofilm formation. Six of 46 active components found in TCMs were identified as putative QSIs based on molecular docking...
Zhi-jing Ma et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 33(16), 1990-1993 (2008-12-18)
To investigate the chemical constituents of Fraxinus paxiana. The chemical constituents were isolated and purified by chromatographic techniques and the structures of the compounds were identified with or by spectroscopic methods. Fifteen compounds were obtained from the methanol extract of...
Reversed-phase HPTLC densitometric evaluation of fraxin in Fraxinus excelsior leaves.
P Poukens-Renwart et al.
Journal of pharmaceutical and biomedical analysis, 10(10-12), 1089-1091 (1992-10-01)

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