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Phenolic Compounds from frullania nisquallensis
Youn Chul Kim,David G. I. Kingston 한국생약학회 1995 생약학회지 Vol.26 No.3
Five phenolic compounds were isolated from the MeCOEt extract of Frullania nisquallensis (Jubulaceae), namely methyl 2,4-dihydroxy-3,6-dimethylbenzoate, methyl 2,4-dihydroxy-6-methylbenzoate, acacetin, betuletol, and pectolinaringenin. Revised <sup>13</sup>C-NMR data of methyl 2,4-dihydroxy-6-methylbenzoate and betuletol are reported.
Two Phenolic amides from Cocculus diversifolius
Youn Chul Kim,David G. I. Kingston 한국생약학회 1995 생약학회지 Vol.26 No.3
Two phenolic amides were isolated from the stem of Cocculus diversifolius (Menispermaceae) and identified as N-traps-feruloyl tyramine and N-traps feruloyl 3-methyldopamine by spectroscopic methods.
A New Triterpene Saponin from Pittosporum viridiflorum from the Madagascar Rainforest
Seo, Youngwan,Berger, John M.,Hoch, Jeannine,Neddermann, Kim M.,Bursuker, Isia,Mamber, Steven W.,Kingston, David G. I. 韓國海洋大學校 附設 海洋科學技術硏究所 2002 硏究論文集 Vol.11 No.1
A novel triterpenoid saponin, pittoviridoside (1), which possesses an unusual 2,3,4-trisubstituted glycosidic linkage, has been isolated from Pittosporum viridiflorum using the engineered yeast strains 1138, 1140, 1353, and Sc-7 for bioactivity-guided fractionation. The structure of this compound was determined to be 3-O-[β-D-glucopyranosyl(1→2)]-[α-D-arabinopyranosyl(1→3)], [α-1-arabinofuranosyl(1→4)-β-D-glucuronopyranosyl-21-angeloyl-22-senecioylolean-12-en-3β,15α,16α,21β,22α,28-hexol by spectral, chemical, and GC analyses. This compound showed weak cytotoxicity against the A2780 human ovarian cancer cell line.
Two New Flavonol Glycosides From The Aerial Parts of Lotus lalambensis Growing in Saudi Arabia
Hanan M. El-Youssef,Brian T. Murphy,Masouda E. Amer,Adnan J. Al-Rehaily,Maged S. Abdel-Kader,David G. I. Kingston 한국생약학회 2008 Natural Product Sciences Vol.14 No.2
Phytochemical study of the aerial parts of Lotus lalambensis Schweinf resulted in the isolation and identification of two new flavonol glycosides; kaempferol 3-O-(5"-acetyl)-apioside-7-O-α-L-rhamnopyranoside (1) and kaempferol 3-O-α-[β-D-xylosyl-(1"" → 2")-L-rhamnopyranoside]-7-O-α-L-rhamnopyranoside (2). Structures were determined utilizing different physical, chemical, spectroscopic data including 2D-NMR experiments and HRFABMS.