• BMB Reports
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• v.33 no.6
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• pp.506-509
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• 2000

To obtain Cytochrome $c_3$ labeled with a stable isotope, the conditions of cultivation and the composition of medium for DvMF were examined. The growth of DvMF was steady and reproducible under purging with $N_2$ and under pH control. DvMF was able to go on a defined medium without natural products. The composition of the medium containing a small amount of $NH_4Cl$ as sole nitrogen source was established. Then, uniformly $^{15}N-labeled$ Cytochrome $c_3$ was obtained during the culture of DvMF in a defined medium with $^{15}NH_4Cl$; it was confirmed by $^{1}H-^{15}N$ HMQC.

• Journal of the Korean Chemical Society
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• v.39 no.4
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• pp.301-305
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• 1995

The cytotoxic metabolites, against the KB cell line, halenaquinone, epispongiatriol and aldisin were isolated from the sponge Spongia sp. collected in September 1992, Manado Bay, Sulawesi in Indonesia. Their structures were elucidated by 1H, 13C NMR, 1H 13C(1 bond) Heteronuclear Multiple Quantum Coherence Spectroscopy (HMQC), 1H 13C(2 and 3 bond) Heteronuclear Multiple Bond Correlation Spectroscopy (HMBC), Electron Impact Mass Spectroscopy (EI ms) and Infrared Spectroscopy (IR).

• Bulletin of the Korean Chemical Society
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• v.16 no.10
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• pp.991-994
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• 1995

• Applied Biological Chemistry
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• v.38 no.2
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• pp.184-189
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• 1995

(20S)- and (20R)-Ginsenoside $Rh_2$ were prepared from crude ginseng saponin by chemical treatments. The $^1H-$ and $^{13}C-NMR$ signals of these compounds were fully assigned by various NMR techniques such as DEPT, $^1H-^1H$ COSY, HMQC, HMBC and NOESY.

• Korean Journal of Pharmacognosy
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• v.29 no.2
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• pp.142-145
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• 1998

Two phenylpropanoids and one flavan 3-ol were isolated from Lepisorus thunbergianus (Polypodiaceae, fern), which is used as folkmedicine. Phenylpropanoids were identified as caffeic acid and chlorogenic acid, and flavan 3-ol was elucidated as (-)-epicatechin 7-O-${\beta}$-D-glucoside by physico-chemical and spectral evidences (HMQC, NOESY).

• Proceedings of the Korean Magnetic Resonance Society Conference
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• 2002.08a
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• pp.53-53
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• 2002

• Journal of the Korean Chemical Society
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• v.42 no.1
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• pp.64-68
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• 1998

Three anthraquinones, chrysophanol, physcion and 1-o-methyl-2-methoxychrysophanol which have $Na^+,K^+-ATPase$ and cyclic AMP phosphodiesterase lowering activities related to cardiotonic action were isolated from the Korean marine echiura, Urechis unicintus. Spectroscopic methods, including HMQC, HMBC and NOE studies, were used to establish the structures.

• Journal of the Korean Chemical Society
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• v.38 no.10
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• pp.749-752
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• 1994

Two furanosesquiterpenes, (5'E)-5-(2',6'-dimethylocta-5',7'-dienyl) furan-3-carboxylic acid (1) and (1'E,5'E)-5-(2',6'-dimethylocta-l',5',7'-trienyl) furan-3-carboxylic acid (2), were isolated from soft coral Sinularia lochmodes collected from Palikir pass at Pohnpei Micronesia, June, 1990 in Hawaii. Their structures were elucidated by $^1H$, $^{13}C$ NMR, Homo-COSY, $^1H$-$^{13}C$ (1 bond) Heteronuclear Multiple Quantum Coherence Spectroscopy (HMQC), $^1H$-$^{13}C$ (2 and 3 bond) Heteronuclear Multiple Bond Coherence Spectroscopy (HMBC), Electron Impact Mass Spectroscopy (EI-ms), and Infrared Spectroscopy (IR).

• Journal of the Korean Chemical Society
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• v.54 no.6
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• pp.701-706
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• 2010

Two polyacetylenes (1 and 2), four coumarins (3-6), and one sesquiterpene (7) were isolated from the halophyte Glehnia littoralis. Particularly, compound 6 and 7 were isolated for the first time from Glehnia littoralis. Their chemical structures have been determined by extensive 2-D NMR experiments such as $^1H$, COSY, HMQC and HMBC and by comparison with the reported data in the literature.

• Analytical Science and Technology
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• v.9 no.4
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• pp.355-363
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• 1996

The two metabolites, Aaptamine(1) and Demethyl(oxy)aaptamine(2) were isolated from marine Sponge Luffariella sp., collected in October 1992, Manado Bay, Sulawesi in Indonesia showed in vitro activity against KB cancer cell line. Their structures were elucidated by $^1H-$, $^{13}C-NMR$, $^1H-^{13}C$(1 bond) heteronuclear multiple quantum coherence spectroscopy(HMQC), electron ionization mass spectroscopy(EIMS), ultra-violet spectroscopy(UV) and infrared spectroscopy(IR).