• Korean Journal of Medicinal Crop Science
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• v.16 no.4
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• pp.231-237
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• 2008

This study was conducted to determine the amount of flavonoids in Salicomia herbacea L. grown by a liquid chromatography / mass spectrometry (LC/MS). The flavonoids-contained quercetin (124.43 ppm), rutin (2.57 ppm), quercetin-3-${\beta}$-glucoside (3992.49 ppm), quercetin-3',4'-glucoside (0.08 ppm) and isorhamnetin (27.81 ppm) were detected in the powder sample. In particular, quercetin-3-${\beta}$-glucoside accounted for more than 99% in hay and 96% in powder. These results suggest that S. herbacea, which is one of halophyte plants, has high functional substances as an antioxidant source.

• Korean Journal of Pharmacognosy
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• v.27 no.3
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• pp.238-245
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• 1996

The activity guided fractionation of $CH_2Cl_2$ soluble part of Platycarya strobilacea leaves(Juglandaceae) has led to the isolation of eight active principles, identified as 5-hydroxy-2-methoxy-1,4-naphthoquinone(1), ursolic acid(2), gallic acid(3), 4,8-dihydroxynaphthalene $1-O-{\beta}-_D-glucoside(4)$, eriodictyol(5), quercetin $3-O-(2'-O-galloyl)-{\beta}-_D-glucoside(6)$. quercetin $3-O-(2'-O-galloyl)-{\beta}-_D-galactoside(7)$ and quercetin $3-O-{\alpha}-_L-rhamnoside(8)$ by the means of chemical and spectral evidence, respectively.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.33 no.3
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• pp.139-144
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• 2007

In the previous study, we reported the antioxidative activity of Equisetum arvense extracts. In this study, its inhibitory effect on elastase and components were investigated. Aglycone fractions obtained from the deglycosylation reaction of ethylacetate fraction among the Equisetum arvense extracts, showed 4 bands and 4 peaks in TLC and HPLC experiments, respectively. Four components were identified as luteolin(composition ratio, 19.12%), quercetin(12.87), apigenin(15.81) and kaempferol(52.20). TLC chromatogram of ethylacetate fraction of Equisetum arvense extract revealed 7 bands and HPLC chromatogram showed 8 peaks, which were identified as kaempferol-3,7-O-diglucoside(composition ratio, 15.74%), luteolin-5-O-glucoside(galuteolin, 11.91), apigenin-5-O-glucoside(12.91), kaempferol-3-O-glucoside(astragalin, 27.94), quercetin-glycoside(10.81, structure was not determined), kaempferol-glycoside (12.33, structure was not determined), luteolin(3.72) and apigenin(4.62) in the order of elution time. The inhibitory effect of aglycone fraction on elastase($IC_{50}$, $9.8{\mu}g/mL$) was very high. But ethylacetate fraction(flavonoid glycosides) rarely exhibited the inhibitory activity on elastase. Combined with the previous results of the antioxidative activity of Equisetum arvense extracts, it is concluded that the inhibitory activity on elastase of the aglycone fraction could be applicable to new functional cosmetics for smoothing wrinkles.

• Archives of Pharmacal Research
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• v.27 no.3
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• pp.300-304
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• 2004

Five caffeic acid derivatives; methyl ester of caffeoylglycolic acid (1), dimethyl ester of caffeoyltartaric acid (2), dimethyl ester of caffeoyltartronic acid (3), monomethyl ester of caffeoyltartronic acid (4), methyl ester of caffeic acid (5), and some other secondary metabolites including; quercetin, quercetin 3-O-$\beta$-D-glucuronide methyl ester, kaempferol, 3,5,7,4'-O-tetramethylkaempferol, $\beta$-sitosterol glucoside, 2$\alpha$-hydroxyursolic acid and 2,24-dihydroxyursolic acid, have been isolated and characterized. All the isolated compounds were characterized with the help of NMR spectroscopy and mass spectrometry. Structure of compound 3 was also confirmed by a single X-ray crystallographic technique. Isolates were evaluated for anti-oxidant activities and most of the tested compounds were found to be potent in DPPH free radical scavenging ($IC_{50}{\;}={\;}4.56-14.17{\;}{\mu\textrm{g}}/mL$) and superoxide anion scavenging ($IC_{50}{\;}={\;}0.58-7.39{\;}{\mu\textrm{g}}/mL$) assays.