New sesquiterpenes with antifeedant activity from Maytenus canariensis (Celastraceae)

Article abstract of DOI:10.1016/S0040-4020(01)86271-2

Five new sesquiterpenes with a dihydro-β-agarofuran skeleton were isolated from Maytenus canariensis (Celastraceae) and identified. Their structures and absolute configurations were determined by means of chemical correlations, ¹H and ¹³C NMR studies, bidimensional ¹H-¹H and ¹H-¹³C correlations, NOE experiments, selective INEPT, and CD studies. The new sesquiterpenes were assayed against Spodoptera littoralis in an election test and exhibited insect antifeedant activity.