• 생약학회지
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• 제44권4호
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• pp.368-371
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• 2013

Five phenolic compounds were isolated from the whole plants of Juncus diastrophanthus (Juncaceae) through repeated column chromatography. Their chemical structures were elucidated as methyl 3,5-di-O-caffeoylquinate (1), luteolin-7-O-${\beta}$-D-glucopyranoside (2), methyl 4,5-di-O-caffeoylquinate (3), quercetin-3-O-${\beta}$-D-arabinopyranoside (4), and methyl 3,4-di-O-caffeoylquinate (5) by spectroscopic techniques. These compounds were isolated for the first time from this plant.

• 생약학회지
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• 제38권2호통권149호
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• pp.181-186
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• 2007

Seven phenolic compounds, scopoletin (1), caffeic acid methyl ester (2), apigenin 7-O-${\alpha}$-L-rhamnosyl-(1${\rightarrow}$6)-O-${\alpha}$-D-glucoside (3), isorhamnetin 7-O-${\alpha}$-D-glucoside (4), isorhamnetin 3-O-${\alpha}$-D-glucoside (5), luteolin (6), and quercetin 3-methyl ether (7) were isolated from the methanol extract of the flowers of S. excelsus. Their structures were established by chemical and spectroscopic methods. The isolated compounds were tested for their cytotoxicity against four human cancer cell lines in vitro using a SRB method. The compounds 4 and 7 showed moderate cytotoxicity with ED$_{50}$ values ranging from 1.59 to 13.14${\mu}$g/ml.

• Archives of Pharmacal Research
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• 제29권12호
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• pp.1086-1090
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• 2006

The chromatographic separation of the MeOH extract from the twigs of Acer tegmentosum led to the isolation of ten phenolic compounds. The structures of these compounds were determined using spectroscopic methods as 3,7,3',4'-tetramethyl-quercetin (1), 5,3'-dihydroxy-3,7,4'-trimethoxy flavone (2), 2,6-dimethoxy-p-hydroquinone (3), (-)-catechin (4), morin-3-O-${\alpha}$-L-lyxoside (5), p-hydroxy phenylethyl-O-${\beta}$-D-glucopyranoside (6), 3,5-dimethoxy-4-hydroxy phenyl-1-O-${\beta}$-D-glucoside (7), fraxin (8), 3,5-dimethoxy-benzyl alcohol 4-O-${\beta}$-D-glucopyranoside (9) and 4-(2,3-dihydroxy propyl)-2,6-dimethoxy phenyl ${\beta}$-D-glucopyranoside (10). The compounds were examined for their cytotoxic activity against five cancer cell lines. Compound 3 exhibited good cytotoxic activity against five human cancer cell lines with $ED_{50}$ values ranging from $1.32\;to\;3.85\;{\mu}M$.

• Journal of the Korean Wood Science and Technology
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• 제35권6호
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• pp.145-151
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• 2007

산겨릅나무 수피의 성분 연구를 위해 수피를 채취하여 70% 아세톤 용액으로 추출하고 농축한 후 분획깔때기로 헥산, 디클로로메탄, 에틸아세테이트 및 수용성으로 순차 추출하여 동결건조하였다. 에틸아세테이트용성 분획에 대하여 Sephadex LH-20 칼럼크로마토그래피를 반복적으로 수행하여 5개의 페놀성 화합물을 분리하였다. 화합물의 구조는 $^1H-NMR$, $^{13}C-NMR$, 2D-NMR 및 MS 스펙트럼을 분석하여, (+)-catechin (1), (-)-epicatechin (2), (-)-epicatechin-3-O-gallate (3), gallic acid (4) 및 6''-O-galloylsalidroside (5)으로 동정하였다. (-)-epicatechin-3-O-gallate (3), gallic acid (4), 6''-O-galloylsalidroside (5)는 산겨릅나무 수피에서 처음 분리되었다.

• Food Science and Biotechnology
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• 제18권2호
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• pp.419-424
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• 2009

Water and 70% ethanol extracts obtained from a sea cucumber (Stichopus japonicus) body wall by heat reflux or pressurized solvent extraction showed 2,2-diphenyl-1-picrylhydrazyl ($DPPH^{\cdot}$) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation ($ABTS^{{\cdot}+}$) scavenging activities comparable to those of fruits and vegetables. The highest activities were observed for the water extract from heat reflux extraction. Crude saponins exhibited higher radical scavenging activities than the soluble matters in the extracts. However, they were responsible for only about 3 to 15% of the scavenging activities of the extracts. Total phenolic contents showed a significant correlation with $DPPH^{\cdot}$ scavenging activities, suggesting a significant contribution of phenolic constituents to the antioxidant properties of the extracts. However, total flavonoid contents showed little correlation with the radical scavenging activities. The results suggest that the water or 70% ethanol extract obtained from sea cucumber body wall by simple heat reflux extraction could provide considerable antioxidant benefits.

• Natural Product Sciences
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• 제22권2호
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• pp.140-145
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• 2016

Seven phenolic compounds including p-coumaric acid (1), 4-hydroxybenzoic acid (2), 4-hydroxybenzaldehyde (3), vanillic acid (4), luteolin (5), acacetin (6), and tricin (7), were isolated from the methylene chloride and ethyl acetate fractions of Echinochloa utilis grains. Compounds (1 - 4, 6) were isolated for the first time from this plant. These compounds were tested for inhibitory activities against LPS-induced NO production in RAW 264.7 cells. Compounds 5 and 6 displayed significant inhibitory effects, with $IC_{50}$ values of $27.9{\pm}2.6$ and $14.0{\pm}1.1{\mu}M$, respectively. The results suggested that E. utilis ethanolic extract may be used as a potential source of anti-inflammatory agents and functional foods for the treatment of allergic diseases.

• 생약학회지
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• 제44권3호
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• pp.220-223
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• 2013

In the course of screening tyrosinase inhibitory activity, total methanolic extract and EtOAc-soluble fraction of Smilax china leaves showed significant inhibitory activity. Further fractionation and isolation of the EtOAc-soluble fraction resulted in 12 phenolic compounds, which were identified as 4-hydroxybenzoic acid (1), 3,4-dihydroxybenzaldehyde (2), 3,4-dihydroxybenzoic acid (3), 3,4-dihydroxyacetophenone (4), 3-hydroxy-4-methoxy benzoic acid (5), trans-p-hydroxycinnamic acid (6), cis-p-hydroxycinnamic acid (7), trans-resveratrol (8), cis-resveratrol (9), dihydroresveratrol (10), moracin M (11) and kaempferol (12). Compounds 1-11 were first reported from this plant. Among the isolated compounds, compounds 2, 8, 9 and 12 showed strong inhibition on tyrosinase activity.

• Journal of Ginseng Research
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• 제16권3호
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• pp.228-234
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• 1992

There has been general tendency to explain the traditional ginseng efficacy through the pharmacological and biochemical activities of ginsenosides. However, when we analyze the pharmacological and biological data on ginseng reported yet, we can easily arrive at the conclsion that most of the data on pharmacological and biological activities must have been obtained using impure ginsenoside samples, which should contain some non-saponin constituents as impurities. Based on the above back-ground, the non-saponin constituents of ginseng were studied in our laboratory. Phenolic substances including Maltol, Vanillic Acid, Salicylic Acid, Ferrulic Acid and Caffeic acid and impure ginsenoside samples were found to show strong antioxidant and anti-fatigue activities, while pure ginsenosides were devoid of the activities. Maltol, one of antioxidant components In Korean red ginseng drew a special interest due to its very low pro-oxidant activity. The antioxidant activity of ginseng may be considered as scientific basis for the antiageing activity which was described in traditional medicinal material book as "long-term medication of ginseng will improve bio-efficiency and extend life-span" The lignin components, another non-saponin consitutents, isolated from ginseng extract In our laboratory may eplain the hepato-protective activity of ginseng which has been repeatedly rtaimed as one of the efficacies of ginsenosides. The P-carboline alkaloids isolated in our laboratory as one of the non-saponin constituents of ginseng may play some pharmacological activities which should also be investigated. Present paper will include chemistry and biochemical aspects of the non-saponin constituents of ginseng with special interests for the explanation of traditional ginseng efficacy on modern scientific basis.fic basis.

• Journal of Ginseng Research
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• 제8권1호
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• pp.22-31
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• 1984

Volatile flavor components of fresh ginseng (Panax ginseng C.A. Meyer.) were studied. Steam distillate of fresh ginseng was extracted with ethyl ether and the extract was separated into four fraction: neutral, phenolic, acidic and basis fractions. The ethyl ether concentrates and neutral fraction were analyzed by a combination of SE-54 fused silica capillary gas chromatography and mass spectrometry. Major flavor components of fresh ginseng were predominantly mono(n +2) and sesquiterpenes(n +3) in over two hundred constituents. Of these, 28 were newly identified in volatile flavor components of fresh ginseng by GC-MS.

• Bulletin of the Korean Chemical Society
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• 제35권7호
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• pp.2151-2154
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• 2014