A new sesquiterpenoid,named baimuxifuranic acid,has been isolated from the volatile oil of Aquilaria sinensis(Lour.)Gilg.belonging to the family Thymelaceae by silica gel column chromatography.Based on spectral analys...A new sesquiterpenoid,named baimuxifuranic acid,has been isolated from the volatile oil of Aquilaria sinensis(Lour.)Gilg.belonging to the family Thymelaceae by silica gel column chromatography.Based on spectral analysis its structure was deduced as(1).Reduction of baimuxifuranic acid by LiAlH_4 gave a展开更多
A new bisabolane sesquiterpene, 5 beta-acetoxy-4 beta, 8-diangeloyloxy-2 beta,3 beta, :10,11-diepoxy-bisabola-7 (14)-ene, was isolated from the roots of Ligularia songarica and its structure was elucidated on the basi...A new bisabolane sesquiterpene, 5 beta-acetoxy-4 beta, 8-diangeloyloxy-2 beta,3 beta, :10,11-diepoxy-bisabola-7 (14)-ene, was isolated from the roots of Ligularia songarica and its structure was elucidated on the basis of spectroscopic methods, especially 2D-NMR techniques.展开更多
Two new eremophilane derivatives and one new nor-sesquiterpene were isolated from Ligularia veitchiana.Their structures were elucidated by spectroscopic methods and 2D-NMR tech- niques and shown to be 1β,10β-epoxy-6...Two new eremophilane derivatives and one new nor-sesquiterpene were isolated from Ligularia veitchiana.Their structures were elucidated by spectroscopic methods and 2D-NMR tech- niques and shown to be 1β,10β-epoxy-6β-(2′—semialdehyde acetal hydroxymethylacryloyloxy)- 8β-ethoxy-eremophil-7(11)-en-12,8α-olide(1),1β-hydroxy-Δ~6,Δ~9-8-oxo- eremophil-(12)-oic-acid(2)and 1β-hydroxy-Δ~6,Δ~9-8-oxo-11-nor-11-hydroxy- eremophiladiene(3).展开更多
A new sesquiterpene with an eudesmane skeleton,named Chrysantherol was isolated from the flowers of Chrysanthemum indicum.Its structure was elucidated as 1 mainly by the analysis of spectral data.
Two new beta-dihydroagarofuran sesquiterpene polyol esters were isolated from Celastrus paniculatus.subsp.paniculatus. Their Structures were deduced on the basis of spectral analyses including 2D NMR. CO2 supercritica...Two new beta-dihydroagarofuran sesquiterpene polyol esters were isolated from Celastrus paniculatus.subsp.paniculatus. Their Structures were deduced on the basis of spectral analyses including 2D NMR. CO2 supercritical fluid was used in separation.展开更多
Four new sesquiterpenes were isolated from the roots of Ligularia virgaurea, and identified as furanomexicanane-9-ene-8-one(1), 9β, 10β-epoxyfuranomexicanane-8-one(2), virgauride(3) and virgaurin A(4) by spectral me...Four new sesquiterpenes were isolated from the roots of Ligularia virgaurea, and identified as furanomexicanane-9-ene-8-one(1), 9β, 10β-epoxyfuranomexicanane-8-one(2), virgauride(3) and virgaurin A(4) by spectral methods.展开更多
文摘A new sesquiterpenoid,named baimuxifuranic acid,has been isolated from the volatile oil of Aquilaria sinensis(Lour.)Gilg.belonging to the family Thymelaceae by silica gel column chromatography.Based on spectral analysis its structure was deduced as(1).Reduction of baimuxifuranic acid by LiAlH_4 gave a
文摘A new bisabolane sesquiterpene, 5 beta-acetoxy-4 beta, 8-diangeloyloxy-2 beta,3 beta, :10,11-diepoxy-bisabola-7 (14)-ene, was isolated from the roots of Ligularia songarica and its structure was elucidated on the basis of spectroscopic methods, especially 2D-NMR techniques.
文摘Two new eremophilane derivatives and one new nor-sesquiterpene were isolated from Ligularia veitchiana.Their structures were elucidated by spectroscopic methods and 2D-NMR tech- niques and shown to be 1β,10β-epoxy-6β-(2′—semialdehyde acetal hydroxymethylacryloyloxy)- 8β-ethoxy-eremophil-7(11)-en-12,8α-olide(1),1β-hydroxy-Δ~6,Δ~9-8-oxo- eremophil-(12)-oic-acid(2)and 1β-hydroxy-Δ~6,Δ~9-8-oxo-11-nor-11-hydroxy- eremophiladiene(3).
文摘A new sesquiterpene with an eudesmane skeleton,named Chrysantherol was isolated from the flowers of Chrysanthemum indicum.Its structure was elucidated as 1 mainly by the analysis of spectral data.
文摘Two new beta-dihydroagarofuran sesquiterpene polyol esters were isolated from Celastrus paniculatus.subsp.paniculatus. Their Structures were deduced on the basis of spectral analyses including 2D NMR. CO2 supercritical fluid was used in separation.
文摘Four new sesquiterpenes were isolated from the roots of Ligularia virgaurea, and identified as furanomexicanane-9-ene-8-one(1), 9β, 10β-epoxyfuranomexicanane-8-one(2), virgauride(3) and virgaurin A(4) by spectral methods.
