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이대영(Dae-Young Lee),조진경(Jin-Gyeong Cho),이민경(Min-Kyung Lee),이재웅(Jae-Woong Lee),박희정(Hee-Jeong Park),이윤형(Youn-Hyung Lee),양덕춘(Deok-Chun Yang),백남인(Nam-In Baek) 고려인삼학회 2008 Journal of Ginseng Research Vol.32 No.4
수삼으로부터 용매추출, 용매분획 및 silica gel column chromatography를 반복하여 ginsenoside Rg₁을 분리하였다. Ginsenoside Rg₁의 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 Rg₁의 ¹H- 및 <SUP>13</SUP>C-NMR 데이터를 HSQC 및 HMBC와 같은 2D-NMR 실험을 통하여 정확하게 동정하였다. The fresh ginseng roots were extracted in aqueous methanol (MeOH), and the obtained extracts were partitioned using ethyl acetate (EtOA), n-butanol (n-BuOH), and water, successively. The repeated silica gel column chromatography for n-BuOH fraction afforded a purified ginsenoside Rg₁ The physico-chemical, spectroscopic and chromatographic data of ginsenoside Rg₁ such as crystallization characteristics, melting point, specific rotation, infrared spectrometry (IR) data, fast atom bombardment/mass spectrometry (FAB/MS) data, nuclear magnetic resonance (NMR) data, retention factor (Rf) in thin layer chromatography (TLC) experiment, and retention time (r.t.) in HPLC analysis, were measured and compared with those reported in literatures. Especially, the previous literatures reported different data for ginsenoside Rg₁ in the ¹H- and <SUP>13</SUP>C-NMR experiments. This paper gives the exactly assigned NMR data through 2D-NMR experiments, such as ¹H-¹H correlation spectroscopy (COSY), hetero nuclear single quantum correlation (HSQC), and hetero nuclear multiple bond connectivity (HMBC).
천연물 / 유기화학 : 생강나무(Lindera obtusiloba Blume) 목부로부터 Flavonoid 및 Lignan 화합물의 분리
서경화 ( Kyeong Hwa Seo ),백미영 ( Mi Young Baek ),이대영 ( Dae Young Lee ),조진경 ( Jin Gyeong Cho ),강희철 ( Hee Cheol Kang ),안은미 ( Eun Mi Ahn ),백남인 ( Nam In Baek ),이윤형 ( Youn Hyung Lee ) 한국응용생명화학회(구 한국농화학회) 2011 Journal of Applied Biological Chemistry (J. Appl. Vol.54 No.3
The stem woods of Lindera obtusiloba Blume were extracted in 80% aqueous methanol and the concentrated extract was partitioned with ethyl acetate (EtOAc), butanol (n-BuOH), and H2O, successively. From the EtOAc and n-BuOH fractions, five compounds were isolated through the repeated silica gel, octadecyl silica gel, and Sephadex LH-20 column chromatographies. On the basis of spectroscopic data including mass spectrometry, IR, 1H-NMR, 13C-NMR, distortionless enhancement by polarization transfer, and two-dimensional-NMR gradient correlated spectroscopy (gCOSY), gradient heteronuclear single quantum correlation (gHSQC), gradient heteronuclear multiple bonding connectivity (gHMBC), the chemical structures of the compounds were determined as asarinin (1), (+)-catechin (2), (-)-epicatechin (3), hyperin (4), and nudiposide (5). Compounds 1 and 5 were isolated for the first time from the stem wood of L. obtusiloba Blume.
Isolation of Phenylglycosides from the Stems of Spiraea prunifolia var. simpliciflora
Su-Yeon Kim(김수연),Na-Young Song(송나영),Jin-Gyeong Cho(조진경),Jeong-Hwa Kwon(권정화),Kyeong-Hwa Seo(서경화),Ye-Jin Jung(정예진),Nam-In Baek(백남인),Youn-Hyung Lee(이윤형),Hee-Cheol Kang(강희철) 한국약용작물학회 2013 한국약용작물학회 학술대회논문집 Vol.2013 No.1