Neo-clerodane diterpenoid insect antifeedants from Ajuga reptans cv Catlins Giant
1998
Bremner, P.D. | Simmonds, M.S.J. | Blaney, W.M. | Veitch, N.C.
Three new neoclerodane diterpenoids (14, 15-dehydroajugareptansin, 3-beta-hydroxyajugavensin B and 3-hydroxyajugamarin F4), have been isolated from aerial parts of Ajuga reptans cv Catlins Giant, together with the known compound, ajugareptansin. The structures were determined by 1H and 13C NMR spectroscopy and MS. Insect antifeedant testing of all four compounds revealed that 14,15-dehydroajugareptansin had significant activity against sixth stadium larvae of Spodoptera littoralis.
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