• Korean Journal of Pharmacognosy
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• v.25 no.1
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• pp.20-23
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• 1994

From the whole plants of Orostachys japonicus(Crassulaceae), taraxerone, stigmast-4-ene-3-one and ergost-4-ene-3-one were isolated and characterized by spectral data.

• Archives of Pharmacal Research
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• v.10 no.3
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• pp.169-172
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• 1987

From the leaves of Rhododendron brachycarpum, rhododendrin, grayanotoxin I and guaijaverin were isolated and characterized by spectral data.

• YAKHAK HOEJI
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• v.46 no.2
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• pp.98-101
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• 2002

The phytochemical study of nutmeg, the seeds of Myristica fragrans Houttuyn (Myristicaceae) led to the isolation of three lignans, safrole (I), macelignan (III), and a 3,4 : 3',4'-bis(methylenedioxy)lignan (II). The compound II was identified by a mixture (1:1) of (8S, 8'R)- and (8S, 8'S)-forms of bis(3, 4-methylenedioxy)-8, 8'-neolignan by $^1$H-, $^{13}$ C-NMR and $^1$H-$^1$H COSY spectral data. The compound II was isolated for the first time from Myristica fragrans.

• Archives of Pharmacal Research
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• v.12 no.1
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• pp.39-41
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• 1989

From the stem of Cudrania tricuspidata, ${\beta}$-sitosterol, ${\beta}$-sitosterol glucoside, arthocarpesin, norarthocarpetin, and 5-O-methyl genistein were isolated and characterized by spectral data.

• Bulletin of the Korean Chemical Society
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• v.19 no.3
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• pp.345-348
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• 1998

Two synthetic procedures were developed for the preparation of monoesters of calix[4]arene, one via dibenzylation the other via monobenzylation route. Dibenzylation pathway can provide specifically monobenzoester of calix[4]arene, but monobenzylation method could produce a series of monoesters of calix[4]arene such as acetyl, isobutyryl, and benzoesters. Conformational properties were discussed on the basis of 1H and 13C NMR data.

• Natural Product Sciences
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• v.5 no.2
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• pp.104-106
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• 1999

The chloroform fraction of the aqueous extract of the fresh leaves of Vitex negundo by bioactivity guided isolation yielded a pure compound, rotundial (1) which has shown potent mosquito repellent activity. Using spectral data (UV, IR, $^1H\;&\;^{13}C$ NMR and MS) its structure has been elucidated.

• Proceedings of the Korea Crystallographic Association Conference
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• 2002.11a
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• pp.29-29
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• 2002

Reaction of [$Cp^*Rh(NO_3)OTf$] (1) with 2,6-diisopropylaniline under argon led to the formation of $[Cp^*Rh({\eta}^6-2,6-diisopropylaniline)](OTF)_2$, (2). Compound 2 was characterized by NMR, IR, elemental analysis, and X-ray diffraction. Crystallrographc data for 2: orthorhombic, space group $Cmc2_1$, $a=19.850(16){\AA}$, $b=9.870(8){\AA}$, $c=15.774(13){\AA}$, Z = 4, $R(wR_2)=0.0362(0.0938)$.

• Journal of the Korean Chemical Society
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• v.58 no.5
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• pp.450-455
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• 2014

In the present study, a series of novel N-(1H-benzo[d]imidazol-2-yl)methyl-5-[(hetero)aryl-1,3,4-oxadiazol-2-yl]methanamine (4a-4j) were efficiently synthesized. Condensation of hydrazide derivative 3 with various carboxylic acid derivatives yielded N-[(1H-benzo[d]imidazol-2-yl)methy](5-substituted-1,3,4-oxadiazol-2-yl)methanamine (4a-4j) and compound 5-{[(1H-benzo[d]imidazol-2-yl)methylamino]methyl}-1,3,4-oxadiazole-2-thiol (4k) was obtained on treating hydrazide 3 with carbon disulfide. All the newly synthesized analogues were characterized by IR, $^1H$ NMR, $^{13}C$ NMR and mass spectral data.

• Bulletin of the Korean Chemical Society
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• v.32 no.6
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• pp.2101-2104
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• 2011

• Journal of the Korean Magnetic Resonance Society
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• v.15 no.2
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• pp.128-136
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• 2011

A new sesterterpenoid, phorbaketal derivative, was isolated from the marine sponge Phorbas species. Its planar structures was completely determined from a combination of extensive 1D and 2D NMR experiments and MS data, and also the stereochemistry on the chiral centers were established by the ROESY experiment and the comparison with the $^1H$ and $^{13}C$ chemical shifts of the known phorbaketal compounds. This compound 1 moderately showed cytotoxicity effect against hepatoma cancer HepG2 cell.