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neo-Clerodane Diterpenoids from the Aerial Part of Scutellaria barbata

✍ Scribed by Hanna Lee; Sang Hee Shim

Publisher
John Wiley and Sons
Year
2011
Tongue
German
Weight
179 KB
Volume
94
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Three new neo‐clerodane diterpenoids, barbatellarines C–E (1–3), were isolated from the CHCl~3~‐soluble fraction of the aerial part of Scutellaria barbata. Their chemical structures were elucidated by detailed analysis of NMR and MS data. Compounds 1 and 2 were C(13) epimers, which was confirmed by an NOE difference experiment and the NOESY spectrum. The relative configuration was determined on the basis of the ^1^H‐NMR J‐value and NOE data, while the absolute configuration of the previously isolated analogue, barbatellarine B (4), as a representative member of the group, was assigned by CD analysis.

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