Bioactive terpenoids from sunflower leaves cv. Peredovick
2002
Macias, F.A. | Torres, A. | Galindo, J.L.G. | Varela, R.M. | Alvarez, J.A. | Molinillo, J.M.G.
The CH2Cl2 extract of dried leaves of Helianthus annuus L. cv. Peredovick has yielded, in addition to the known sesquiterpene lactones annuolide E and leptocarpin, and the sesquiterpenes heliannuols A, C, D, F, G, H, I, the new bisnorsesquiterpene, annuionone E, and the new sesquiterpenes heliannuol L, helibisabonol A and helibisabonol B. Structural elucidation was based on extensive spectral (one and two-dimensional NMR experiments) and theoretical studies. The sesquiterpenes heliannuol A and helibisabonol A and the sesquiterpene lactone leptocarpin inhibited the growth of etiolated wheat coleoptiles.
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