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neoclerodane/scutellaria
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9 resultados
Neoclerodane diterpenoids from Scutellaria barbata.
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Eight new neoclerodane diterpenoids (1- 8), scutebatas H-O, together with eight known compounds, have been isolated from the whole plant of Scutellaria barbata D. Don. Their structures were elucidated on the basis of spectroscopic studies. In vitro cytotoxicity of selected compounds against cancer
Two new neoclerodane diterpenoids from Scutellaria barbata D. Don growing in Vietnam.
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Various chromatographic separations of the aerial parts of Scutellaria barbata afforded two new neoclerodane diterpenoids, scutebatas S and T (1 and 2), along with scutebata D (3). Their structures were elucidated by spectroscopic methods including high-resolution electrospray ionization mass
Cytotoxic neoclerodane diterpenoids from Scutellaria barbata.
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Seven new neoclerodane diterpenoids, scutebatas A-G (1-7), have been isolated from Scutellaria barbata. Compounds 1-3 possess a rare alpha-hydroxy group in their alpha,beta-unsaturated lactone rings. Their structures were elucidated by spectroscopic analysis, and the relative configuration of
Neoclerodane diterpenoids from Scutellaria caerulea.
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Five new neoclerodane diterpenoids have been isolated from Scutellaria caerulea: (11S*)-6 alpha-acetoxy-7 beta,11-diisobutiryloxy-1 beta,8 beta-dihydroxy-4(18),13-neoclerodadien-15,16-olide (scuterulein A) (1); (13R*)-1 beta-6 alpha-7 beta-triacetoxy-11 beta-benzoyloxy-8
Neoclerodane diterpenoids from Scutellaria barbata with cytotoxic activities.
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Two new neoclerodane diterpenoids, barbatin F (1), barbatin G (2) together with four known compounds, scutebata A (3), scutebata B (4), scutebata C (5) and scutebata P (6) were isolated from the whole plant of Scutellaria barbata D.Don. Their structures were elucidated on the basis of spectroscopic
Cytotoxic neoclerodane diterpenoids from scutellaria barbata D. Don.
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A new neoclerodane diterpenoid, barbatin H (1) together with fifteen known analogues (2-16) were isolated from Scutellaria barbata D. Don. Their structures were determined on the basis of NMR and HRMS spectral analysis and comparison with the reported data. All of those compounds were comparatively
Natural and hemisynthetic neoclerodane diterpenoids from scutellaria and their antifeedant activity.
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The genus Scutellaria (Labiatae) is a very rich source of neoclerodane diterpenoids, with interesting structural features. These secondary metabolites show several biological properties, the most important being the antifeedant activity against pest insects. The present review reports on natural and
Some biogenetic-type transformations of neoclerodane diterpenoids from Scutellaria species.
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Treatment of scutebaicalin (1) with K-t-BuO yielded both the (13S)- and (13R)-8beta,13-epoxyclerodanes 2 and 3, respectively, by a Michael-type heterocyclization reaction. Identical treatment of scutalpin B (4) gave the corresponding (11E)-11-deacetoxy-12-dehydro derivative 5 by an elimination
Minor diterpenoids from Scutellaria polyodon.
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Four minor neoclerodane diterpene constituents were isolated from the aerial parts of Scutellaria polyodon. These compounds were characterized as the new scupolins J (1) and K (2) and the previously known scutalpin O (3) and scutalsin.
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