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Isolation and identification of neo-clerodane diterpenes from Ajuga remota by high-performance liquid chromatography

AutorColl Toledano, Josep; Tandrón, Yudelsy A.
Palabras claveHPLC
Neo-clerodane diterpenes
Anti-feedant activity
Ajuga remota
Fecha de publicación24-ene-2005
EditorJohn Wiley & Sons
CitaciónPhytochemical Analysis 16(1): 61-67 (2005)
ResumenIn order to explore the suitability of reversed-phase HPLC for the rapid isolation, identification and semipreparative fractionation of neo-clerodane diterpenes from Ajuga remota, an extract from aerial parts of the plant was examined using a C18 column with UV detection and gradient elution with water:methanol. In addition to the known diterpenes ajugarins I, II, IV and V and clerodin, the presence and chromatographic behaviours of ajugapitin, dihydroajugapitin, dihydroclerodin and deacetylajugarin IV, not previously isolated from A. remota, were established. Presence of the epimeric mixture of 14-hydro-15-hydroxyclerodin (scutecyprol A) was also demonstrated together with that of 14-hydro-15-hydroxyajugapitin, the latter only in trace amounts. The structures of all isolated diterpenes were determined from NMR data. The anti-feedant activities of the isolated compounds against Spodoptera littoralis are also reported here.
Descripción6 pages, 2 figures, 4 tables.-- PMID: 15688959 [PubMed].-- Printed version published Feb 2005.
Versión del editorhttp://doi.wiley.com/10.1002/pca.812
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