A new furanoeremophilane and a new eudesmane were isolated from the roots of Ligularia veitchiana. Their structures were elucidated as 1b, 10b-epoxy-6b-isobutyryloxy-9-oxo-furanoeremophilane and 8a-hydroxy-4 (15), 11...A new furanoeremophilane and a new eudesmane were isolated from the roots of Ligularia veitchiana. Their structures were elucidated as 1b, 10b-epoxy-6b-isobutyryloxy-9-oxo-furanoeremophilane and 8a-hydroxy-4 (15), 11-eudesmadiene by spectroscopic methods.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
Two eremophilane-type sesquiterpenoids from the rhizomes of Ligularia veitchiana(Hemsl.) Greenm were isolated and determined as 10α,11-endoperoxide-1(2)-en-7α-hydroeremophilane(1) and 1(10)-en-2-oxo-7α-isop...Two eremophilane-type sesquiterpenoids from the rhizomes of Ligularia veitchiana(Hemsl.) Greenm were isolated and determined as 10α,11-endoperoxide-1(2)-en-7α-hydroeremophilane(1) and 1(10)-en-2-oxo-7α-isopropanol-eremophilane(2).Compound 1 was a new compound and compound 2 was a new natural product.The structures of the two compounds were established by means of spectral methods including 1^H NMR,13^C NMR,2D NMR and MS.展开更多
基金supported by the National Natural Science Foundation of China(No.29972017)
文摘A new furanoeremophilane and a new eudesmane were isolated from the roots of Ligularia veitchiana. Their structures were elucidated as 1b, 10b-epoxy-6b-isobutyryloxy-9-oxo-furanoeremophilane and 8a-hydroxy-4 (15), 11-eudesmadiene by spectroscopic methods.
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Two eremophilane-type sesquiterpenoids from the rhizomes of Ligularia veitchiana(Hemsl.) Greenm were isolated and determined as 10α,11-endoperoxide-1(2)-en-7α-hydroeremophilane(1) and 1(10)-en-2-oxo-7α-isopropanol-eremophilane(2).Compound 1 was a new compound and compound 2 was a new natural product.The structures of the two compounds were established by means of spectral methods including 1^H NMR,13^C NMR,2D NMR and MS.