• 제목/요약/키워드: HMBC-experiment

검색결과 10건 처리시간 0.023초

The NMR assignments of anthraquinones from Cassia tora

  • Choi, Jae-Sue;Jung, Jee-Hyung;Lee, Hee-Jung;Kang, Sam-Sik
    • Archives of Pharmacal Research
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    • 제19권4호
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    • pp.302-306
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    • 1996
  • The $^1H- and^{13}C-NMR$ spectra of alaternin, aurantio-obtusin, chryso-obtusin, obtusin and 2-glucosyl obtusifolin isolated from the seeds of Cassia tora have been assigned based on HMBC, long-range HETCOR, fully $^1H-coupled {13}^C-NMR$, deuterium isotope experiment, and by comparison with the model compounds.

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원지뿌리의 성분연구 (A Study on the Constituents from the Roots of Polygala tenuifolia)

  • 박진서;김기영;도상학;김진숙
    • 생약학회지
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    • 제30권4호
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    • pp.417-419
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    • 1999
  • $Three\;compounds-ethyl-{\beta}-D-glucopyranoside$, 1,2,3,7-tetramethoxyxanthone, 1,7-dimethoxyxanthone-were isolated from roots of Polygala tenuifolia. The structures of these compounds were establised on the basis of spectral evidence including 2D NMR and HMBC studies. $Ethyl-{\beta}-D-glucopyranoside$ was isolated for the first time from Polygala genus and HMBC data of these compounds were first reported.

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황기뿌리에서 분리한 Astragaloside I, II 및 Isoastragaloside I의 HMBC와 1D-TOCSY data를 포함한 nmr assignments (NMR assignments including HMBC and 1D-TOCSY data of Astragaloside I, II and Isoastragaloside I from the Roots of Astragalus membranaceus)

  • 박진서;김정숙;김종문;김진숙
    • 생약학회지
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    • 제31권1호
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    • pp.34-38
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    • 2000
  • Three compounds were isolated from the roots of Astragalus membranaceus (Leguminosae). On the basis of spectroscopic evidences, the structures were characterized as $3-0-{\beta}-D-xylopyranosyl-(2',3'-O-diacetyl)-6-0-{\beta}-D-glucopyranosyl-3{\beta},6{\alpha},16{\beta},25-tetrahydroxy-20(R)$,24(S)-epoxy-cycloartane(Astragaloside I), $3-0-{\beta}-D-xylopyranosyl-(2'-O-acetyl)-6-0-{\beta}-D-glucopyranosyl-3{\beta},6{\alpha},16{\beta},25-tetrahydroxy-20(R)$,24(S)-epoxy-cycloartane(Astragaloside II), $3-0-{\beta}-D-xylopyranosyl-(2',4'-O-diacetyl)-6-0-{\beta}-D-glucopyranosyl-3{\beta},6{\alpha},16{\beta},25-tetrahydroxy-20(R)$,24(S)-epoxycycloartane(Isoastragaloside I). Full data of NMR including HMBC and 1D-TOCSY experiment of these compounds were reported for the first time.

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양하의 근경에서 항균성 물질 분리 및 구조동정 (Isolation and Structure Identification of Antibacterial Substances from the Rhizome of Zingiber mioga Roscoe)

  • 김성철;송은영;김공호;권혁모;강상헌;박기훈;정용환;장기창
    • Applied Biological Chemistry
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    • 제46권3호
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    • pp.246-250
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    • 2003
  • 양하(Zingiber mioga Roscoe) 근경의 에탄을 추출물을 재료로 Staphylococcus aureus, Bacillus subtilis 및 B. cereus에 대한 activity-guided fractionation을 실시하여 항균성 물질 세가지준 얻었다. 항균력실험 결과, 화합물 I과 111은 세가지균주 모두에 활성이 있었고, 화합물 II에서는 B. subtilis과 B. cereus에서만 활성이 나타났다. 그 중에서 가장 활성이 강한 화합물 I을 Bioscreen C로 optical density(600 nm)를 측정하여 증식억제실험을 한 결과 10 ppm 처리시 B. subtilis과 B. cereus에서 72시간동안 강한 증식억제효과를 나타내었으며, S. aureus에서는 25 ppm 처리시 72시간동안 완전증식억제효과를 나타내었다. $1^H-NMR$, ${13}^C-NMR$, DEPT,$1^H-1^H$ COSY, HMQC, HMBC 및 IR 스펙트럼 등을 분석한 결과 화합물 I, II, III은 labdane-type diterpene인 $(E)-8{\beta}(17)-epoxylabd-12-ene-15,16-dial(C_{20}H_{30}O_3,\;MW=318)$, $galanolactone(C_{20}H_{30}O_3,\;MW=318)$ 그리고 galanal A($C_{20}H_{30}O_3,\;MW=318$)로 각각 동정되었으며, 이들은 양하의 근경에서는 처음 분리된 것이다.

Ginsenoside Rg1의 NMR 데이터 동정 (Identification of NMR Data for ginsenoside Rg1)

  • 이대영;조진경;이민경;이재웅;박희정;이윤형;양덕춘;백남인
    • Journal of Ginseng Research
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    • 제32권4호
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    • pp.291-299
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    • 2008
  • 수삼으로부터 용매추출, 용매분획 및 silica gel column chromatography를 반복하여 ginsenoside $Rg_1$을 분리하였다. Ginsenoside $Rg_1$의 결정특성, 녹는점, 비선광도, IR 데이터, FAB/MS 데이터, TLC에서의 Rf 값, HPLC에서의 r.t. 및 NMR 데이터를 표준화한 조건으로 측정하여 문헌 값과 비교 고찰하였다. 특히 ginsenoside $Rg_1$$^{1}H-$$^{13}C$-NMR 데이터를 HSQC 및 HMBC와 같은 2D-NMR 실험을 통하여 정확하게 동정하였다.

Isolation of Magnolialide and Artesin from Cichorium intybus: Revised Structures of Sesquiterpene Lactones

  • Park, Hee-Juhn;Kwon, Sang-Hyuk;Yoo, Ki-Oug;Jung, Won-Tae;Lee, Kyung-Tae;Kim, Joo-Il;Han, Yong-Nam
    • Natural Product Sciences
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    • 제6권2호
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    • pp.86-90
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    • 2000
  • Two known eudesmanolides, magnolialide and artesin, were isolated from the roots of Cichorium intybus. Their structures were confirmed by HMBC and NOESY NMR spectral interpretation. Therefore, guaianolides and eudesmanolides that have been previously reported should be revised.

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열대 해면동물 Lipastrotethya sp.에서 분리된 사포닌 화합물 (A New Triterpenoid Saponin from the Tropical Marine Sponge Lipastrotethya sp.)

  • 엄태양;이연주;이희승
    • Ocean and Polar Research
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    • 제38권4호
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    • pp.287-294
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    • 2016
  • Marine sponges have been a remarkably rich source of pharmacologically active and structurally diverse natural products. As a part of our continuing search for novel secondary metabolites of biomedical importance from marine invertebrate, we encountered the sponge Lipastrotethya sp. from Chuuk, Micronesia. The crude organic extract of this animal exhibited considerable cytotoxicity against the K562 cell line. Guided by the $^1H$ NMR analysis, flash chromatography of the crude extract followed by HPLC yielded a new triterpene glycoside, along with ten known saponins of the sarasinoside class. The structure of this new compound was determined by combined spectroscopic methods such as COSY, HSQC and HMBC experiment. Among these metabolites, six compounds exhibited moderate cytotoxicity against ACHN, MDA-MB-231, NCI-H23 and NUGC-3 cell lines.

Aspergillus terreus로부터 항진균성 물질의 분리 및 구조분석 (Isolation and Structure Identification of Antifungal Substance from Aspergillus terreus)

  • 김근기;박기훈;문석식;강규영
    • Applied Biological Chemistry
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    • 제40권6호
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    • pp.593-596
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    • 1997
  • 시설내 토양으로부터 식물병원균에 활성을 갖는 길항균을 탐색하는 과정에서 주요 식물 병원균인 Phytophthora capsici, Botrytis cinerea, Rhizoctonia solani, Pythium ultimum 및 Fusarium oxysporum에 활성을 갖는 4종류의 길항균(AF1, AE2, AE3, AF4)을 분리하였다. 이들 중 가장 높은 활성을 나타낸 AE2균을 동정한 결과, 생육한 균은 짙은 오렌지색과 황갈색을 띄었으며, 현미경의 morphology는 column형의 conidial head와 foot cell로 부터 곧게 뻗은 분생자와 2중층의 포자낭병을 형성했다. 그리고 MY20 agar 배지에서 투명한 둥근세포의 형성등이 Aspergillus terreus의 형태와 일치 하였다. Pot에서 병원균과 A. terreus를 동시에 처리하여 오이의 생육을 조사한 결과, 토양중량당 A. terreus의 균체를 1% 처리에 40%, 5% 처리에 57%, 10% 처리에는 75% 병발생율을 억제시켰다. 그리고 A. terreus의 배양여액으로부터 activity-guided fractionation을 실시하여 항진균성 물질인 화합물 I 을 얻었다. $^1H$, $^{13}C\;NMR$, DEPT, $^1H-^1H\;COSY$, HMQC, HMBC 및 질량스텍트럼을 분석한 결과 화합물 I 은 butyrolactone I (${\alpha}$-oxo-${\beta}$-(p-hydroxyphenyl)-${\gamma}$-(p-hydroxy-m-3,3-dimethyl-allylbenzyl)-${\gamma}$-methoxycarbonyl-${\gamma}$-butyrolactone, $C_{24}H_{24}O_7$, M.W. = 424)로 동정되었다.

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Isolation of Antifungal Compound and Biocontrol Potential of Lysobacter antibioticus HS124 against Fusarium Crown Rot of Wheat

  • Monkhung, Sararat;Kim, Yun-Tae;Lee, Yong-Seong;Cho, Jeong-Yong;Moon, Jae-Hak;Kim, Kil-Yong
    • 한국토양비료학회지
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    • 제49권4호
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    • pp.393-400
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    • 2016
  • Fusarium graminearum is the main cause of substantial economic loss in wheat production. The aim of this study is to investigate biocontrol potential of Lysobacter antibioticus HS124 against F. graminearum and to purify an antifungal compound. In preliminary study, n-butanol crude extract revealed destructive alterations in the hyphal morphology of F. graminearum and almost degraded with $1,000{\mu}g\;mL^{-1}$ concentration. For further study, the antifungal compound extracted from the n-butanol crude extract of L. antibioticus HS124 was identified as N-Butyl-tetrahydro-5-oxofuran-2-carboxamide ($C_9H_{16}NO_3$) using NMR ($^1H-NMR$, $^{13}C-NMR$, $^1H-^1H\;COSY$, HMBC, and HMQC), and HR-ESI-MS analysis. To our knowledge, N-Butyl-tetrahydro-5-oxofuran-2-carboxamide may be a novel compound with molecular weight of 186.1130. The minimum inhibitory concentration value of antifungal compound was $62.5{\mu}g\;mL^{-1}$ against F. graminearum. In an in vivo pot experiment, crown rot disease from F. graminearum was inhibited when wheat seeds were treated with both HS124 culture and F. graminearum. Growth of wheat seedling was enhanced by treatment of HS124 compared to control. Our results suggest that L. antibioticus HS124 characterized in this study could be successfully used to control F. graminearum and could be used as an alternative to chemical fungicides in modern agriculture.

Pseudomonas sp. RRj 228이 분비하는 항균물질의 동정과 고추탄저균 C. acutatum에 대한 항균활성 (Structural Identification of Antibiotics from Pseudomonas sp. RRj 228, a Antifungal Activity of Collectotrichum acutatum Causing Anthracnose on Pepper)

  • 전상윤;김용균;손홍주;박현철;이상몽;김선태;박기도;강위금;김근기
    • 생명과학회지
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    • 제20권8호
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    • pp.1254-1260
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    • 2010
  • 식물 근권미생물은 식물의 뿌리 표면과 내부에 정착하면서 식물생장 촉진물질을 분비하여 식물생육에 직접적인 영향을 주거나, 항균물질을 분비하여 병원균으로부터 식물 근권환경을 보호하여 식물의 생육을 촉진하게 된다. 이러한 활성을 갖고 있는 미생물을 분리하여 동정하며, 항균물질을 분리, 동정하여 지속농업의 발전과 농업환경의 보전을 위하여 연구를 실시하였다. 논토양으로부터 식물생육촉진활성과 항균활성을 갖는 RRj 228균주를 분리하여, 생리 생화학적방법과 유전학적 방법으로 동정한 결과, Pseudomonas sp.로 동정되었다. RRj 228균주는 B. cinerea, P. ultimum, P. capsici와 R. solani에도 높은 항균활성을 보였으며, 특히 고추탄저병원균인 C. acutatum에 강력한 항균활성을 나타냈다. RRj 228균의 배양여액을 C. acutatum, R. solani 및 P. ultimum에 대한 $ED_{50}$값을 측정한 결과 0.14, 0.16, 0.29 mg/ml로 나타났다. 항균활성물질은 RRj 228 배양여액으로부터 각종 크로마토그라피법으로 순수분리하고, NMR과 GC/MS 등의 기기분석을 실시하여 구조를 Phenazine-1-carboxylic acid (분자량 224)로 동정하였다.