Insect antifeedant ryanodane diterpenes from Persea indica
González-Coloma, Azucena | Terrero, D. | Perales, A. | Escoubas, P. | Fraga, B.M.
The new ryanodane diterpenes cinnzeylanone, ryanodol 14-monoacetate, and epi-cinnzeylanol have been isolated from Persea indica (Lauraceae). The structure of cinnzeylanone has been determined by X-ray analysis. These compounds proved to be antifeedants against Spodoptera litura. Cinnzeylanol and ryanodol were the most active antifeedants of this plant, with a range of activity close to that of ryanodine. This is the first report on the antifeedant effects of this class of diterpenes. Their structure-activity relationships and, possible mode of action are discussed.
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