2024-03-29T08:58:51Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/157952019-02-13T11:32:33Zcom_10261_5063com_10261_5col_10261_5066
2009-08-06T12:43:45Z
urn:hdl:10261/15795
Isolation and structure elucidation of three neo-clerodane diterpenes from Teucrium fruticans L. (LABIATAE)
Coll Toledano, Josep
Tandrón, Yudelsy A.
Structure Elucidation
Teucrium fruticans
Neo-clerodanes
Antifeedant activity
Antifungal activity
6 pages, 1 figure, 1 scheme, 5 tables.-- PMID: 16122769 [PubMed].-- Printed version published Oct 2005.-- Dedicated to Prof. Francisco Camps on the occasion of his 70th birthday.-- Issue title: "Reports on Structure Elucidation".
Recently, the isolation from Teucrium fruticans of neo-clerodanes, namely 7β-hydroxyfruticolone, 11-hydroxyfruticolone, deacetylfruticolone and 6-acetyl-10-hydroxyteucjaponin B, in addition to fruticolone, isofruticolone and 8β-hydroxyfruticolone (three out of the four previously reported ones), and 6-acetylteucjaponin B (isolated from T. scordium and T. grisebachii) was reported. Minor compounds presumably of neo-clerodane nature were shown by HPLC analysis on a new extract. Three new compounds, difuranofruticol, deoxyfruticolone and 10-hydroxyteucjaponin B, and the known 7,8-didehydrofruticolone were unambiguously elucidated based on extensive NMR spectral studies (one- and two-dimensional experiments). The compounds were assayed for their antifeedant activity against Spodoptera littoralis and for their antifungal activity against Rhizoctonia solani. Compounds 9–11 showed low antifeedant activity and the feeding ratio of 12 was moderate-low. None of the tested compounds displayed significant activity against R. solani.
2009-08-06T12:43:45Z
2009-08-06T12:43:45Z
2005-08-24
artículo
Phytochemistry 66(19): 2298-2303 (2005)
0031-9422
http://hdl.handle.net/10261/15795
10.1016/j.phytochem.2005.07.003
1873-3700
eng
http://dx.doi.org/10.1016/j.phytochem.2005.07.003
closedAccess
Elsevier