• 한국식품영양과학회지
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• 제21권3호
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• pp.302-307
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• 1992

들깻잎의 메탄을 추출물이 S. typhimurium TA98과 100에서 aflatoxin B$_1$(AFB$_1$)의 돌연변이 유발성을 억제시키는 효과가 있었다. 메탄을 추출물을 silica gel column을 사용하여 더욱 분획하여 항돌연변이 효과를 시험하였으며, 그중 효과가 가장 컸던 fraction 중의 화합물을 분리, 동정한 결과 2-ethoxy acetate, 1, 2, 3, 4-tetramethyl-cis-cyclobutene, 두 개의 methyl 11, 14, 17-eicosatrienoate 이성체, 12-acetyl-9-octadecanoic acid, 그리고 Phytol이 있음이 잠정적으로 밝혀졌다. Phytol과 methyill, 14, 17-eicosatrienoate의 표준품을 사용하여 AFB$_1$및 Trp-P-2에 대한 항돌연변이 효과를 시험한 결과 그 효과가 컸음이 밝혀졌다.

• 농업과학연구
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• 제19권1호
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• pp.103-114
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• 1992

항산화성 생약을 선발하기 위하여 180종의 생약을 10배량의 methanol 로 추출한 액 $50{\mu}l$와 0.1M-linoleic acid ethanol 용액 $100{\mu}l$를 넣은 시험관을 $50^{\circ}C$에서 20시간 두었다가 POV를 측정하는 방법으로 항산화성을 측정하였을 때 45% 이상의 생약 추출물이 항산화성을 나타내었고 그 중 44종 의 생약추출물의 항산화성은 비교적 강력하였다. 단기 항산화시험에 의해서 항산화성이 비교적 강한 것으로 나타난 44종의 생약을 10배량의 methanol로 추출한액 3ml, 0.1M-methyl linoleate ethanol 용액 10ml 및 0.1M-sodium phosphate buffer(pH 7.0) 37ml를 혼합하여 $40^{\circ}C$에서 35일간 저장하면서 POV의 변화를 측정하였던 바 삼백초, 세신, 진범, 음양곽, 백굴체, 소회향, 고삼, 정향, 황금, 감초 및 파고지 동 11종의 생약추출물의 항산화성이 특히 강하였다. Methan이 추출액의 항산화성이 특히 강하였던 11종의 생약을 ethyl acetate 및 petroleum ether로 추출하여 항산화성을 비교하였을 때 음양곽, 소회향, 정향 및 파고지는 추출용매의 종류에 관계없이 강한 항산화성을 나타내었으나 황금 및 감초 등은 methanol 추출액에서만 강한 항산화능이 나타났다.

• 약학회지
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• 제13권1호
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• pp.47-50
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• 1969

The ether extract of Dang-Gui, the dried root of Angelica gigas N$_{AKAI}$, was placed into a column with aluminium oxide gel. The elution of it with a mixture of n-hexane and ethyl acetate afforded Nodakenetin (I) and the elution with a mixture of n-hexane, ethyl acetate, acetone and methyl alcohol yielded Umbelliferon (II) and Nodakenin (III). Three coumarin derivatives were identified by comparing with authentic samples. The existence of sucrose and glucose was also proved.

• Bulletin of the Korean Chemical Society
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• 제33권6호
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• pp.1900-1906
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• 2012

Three carbazole chromophores featuring dicyano, cyano, ethyl acetate and dimethyl acetate groups as an acceptor moiety with a ${\pi}$-conjugated spacer and $N$-methyl dibenzo[$b$]pyrole as donor were synthesized by Knovenagel condensation and characterized by IR, $^1HNMR$, $^{13}CNMR$, UV-vis, fluorescence spectroscopy, electrochemistry and theoretical B3LYP/6-$311G^*$ level whilst NLO properties and spectroscopic quantities were calculated. Calculations showed remarkable trend with HOMO located on the donor moiety and LUMO on the acceptors dicyano methylene, cyano, ethyl acetate methylene and dimethyl acetate methylene. In agreement with the calculations, solvatochromic, behavior intramolecular charge transfer band was observed in the visible region.

• 약학회지
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• 제25권2호
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• pp.43-47
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• 1981

In an attempt to obtain a saponin antigen, ginsenoside Rg$_{1}$ of Korean ginseng was condensed with bovine serum albumin through a series of modification in the side chain structure of ginsenoside Rg$_{1}$ to prepare a reactive intermediate $Rg_{1}$ azide. The modification of ginsenoside $Rg_{1}$[1] yielded $Rg_{1}$ decacetate [II], mp 252, $Rg_{1}$ acetate-glycol [III], mp 263, $Rg_{1}$ acetate-trisnoraldehyde [IV], mp 231, $Rg_{1}$ acetate-carboxylic acid [V], mp 282, $Rg_{1}$ acetate-methyl ester [VI], mp 271, $Rg_{1}$ hydrazide [VII], mp 220, and finally a reactive intermediate $Rg_{1}$ azide [VIII].

• Bulletin of the Korean Chemical Society
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• 제16권3호
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• pp.252-256
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• 1995

Semiempirical MO calculations using the PM3 method are performed on the reactions of acetate esters with substituted phenolate anions. The mechanistic change from rate-limiting formation to breakdown of the anionic intermediate is shown to occur in the gas-phase, especially for meta-nitrophenyl acetate. However the mechanistic change-over takes place at a lower basicity ($pK_0$) of the anion nucleophile than found for the corresponding formate. This lowering of $pK_0$ has been ascribed to the electron donating effect of the methyl group in the acetate. For the reactions involving rate-limiting breakdown of the intermediate, the large Bronsted coefficients, ${\beta}_X({\beta}_{nuc})$, are expected in general, but the magnitude increases to a larger value and the pK0 is lowered accordingly, when an electron-donating nonleaving group, like $CH_3$, is present. This type of nonleaving group effect provides a necessary condition for the carbonyl addition-elimination mechanism with rate-limiting breakdown of the intermediate.

• 한국식품영양과학회지
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• 제34권6호
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• pp.885-891
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• 2005

SDE추출방법 과 GC/MS로 분석에 의하여 생마늘과 동결 건조마늘의 휘발성 유기성분을 비교하였다. 생마늘과 동결 건조마늘에서 각각 42종, 32종의 화합물이 확인되었으며 , 대부분이 황화합물이었고 alcohol류, aldehyde류, ester류도 확인되었다. Diallyl disulfide, diallyl trisulfide, allyl methyl disulfide, allyl methyl trisulfide는 생마늘과 동결건조마늘 에서 확인된 주요 황화합물이었다. 3-Methyl pyridine, 2-methyl-4-pentenal, 2,3,3-trimethyl-1,4=pentadiene, methional등 생마늘에서 확인된 화합물은 동결건조마늘에서 소실되었고 propanethiol, 2-ethyl-3-butenal, acetic acid 등은 동결건조마늘에서 확인되었으며, 전체적인 휘발성 유기성분의 총량에는 영향을 미치지 않는 수준이었다. 동결건조에 의 하여 마늘의 주요 휘발성 유기성분 중 diallyl disulfide, diallyl trisulfide, allyl methyl disulfide, allyl methyl trisulfide, diallyl sulfide,3-vinyl-4H-1,2-dithiin 등 대부분의 황화합물 함량이 감소하였으며 methyl propyl trisulfide, 3- allylthiopropionic acid, cyclopentyl ethyl sulfide 등은 증가하였다. 그 외 ethyl acetate, ethanol,2-propenol, 2-propenal, hexanal 등의 휘발성 유기성분이 증가하는 것을 확인하였다.

• 농약과학회지
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• 제10권4호
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• pp.249-261
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• 2006

살균활성이 있는 4-isopropyl-3-methylphenol(I)과 5-isopropyl-3-methylphenol(II)을 출발물질로 하여 ester, sulfonyl ester, carbamate, ether 및 phosphoyl ester계열의 50개 화합물들을 합성하였으며, IR, GC/MS와 $^1H$-NMR spectrum을 이용하여 합성을 확인하였다. 이 유도체들에 대한 in vitro 살균활성 실험을 10종의 식물병원균에 대하여 실시한 결과 몇 가지 화합물이 우수한 항균활성을 나타내었다. 이들 화합물을 5가지 식물병(벼도열병, 토마토역병, 오이 잿빛곰팡이병, 벼 잎집무늬 마름병, 오이탄저병)에 대하여 in vivo 항균활성을 조사하였다. 그 결과, 4-isopropyl-3-methylphenyl (2-aminothiazole-4-yl)methoxyiminoacetate(I-7a)는 벼 도열병(Pycularia oryzae)에 methyl (4-isopropyl-3-methylphenoxy)acetate(I-4d)와 methyl (5-isopropyl-3-methylphenoxy) acetate (II-4d)는 오이 잿빛곰팡이병(Botrytis cinerea)에 높은 방제활성을 나타내었다.

• Archives of Pharmacal Research
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• 제21권6호
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• pp.723-728
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• 1998

The chemical behaviours of 4-methyl-2-oxo-2H-benzopyran-7-yl oxoacetyl hydrazine (2) towards some different reagents such as anhydride compounds, aromatic aldehydes, carb on disulphide, and nitrous acid yielded the corresponding pathalazine derivatives (3, 4, 5), hydrazone derivative (6), 1,3,4-oxadiazole derivative (7, 8, 9) and acid azide (10) respectively. Treatmen of 10 with absolute alcohols, amines and ethyl amino acid ester gave the corresponding carbamate derivative (11), substituted urea derivative (12) and ethyl substituted alkyl acetate (13) respectively. The biological activity of some synthesized compounds was evaluated.

• 약학회지
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• 제48권1호
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• pp.65-69
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• 2004

The chromatographic separation of MeOH extract of the aerial parts of Aster glehni (Compositae) led to the isolation of three sesquiterpenes, two sterols and four terpenes. Their structures were determined to be $\beta$-amyrin acetate (1), phytol (2), alismol (3), $\alpha$-tocopheryl quinone (4), $\alpha$-spinasterol (5), 10-O-methyl alismoxide (6), alismoxide (7), and 3-O-(6'-O-palmitoyl-$\beta$-D-glucosyl)-spinasta 7,22-diene (8) by physicochemical and spectroscopic methods . These compounds (1-8) were first isolated from the Aster glehni.