| insect antifeedant activity of three new tetranortriterpenoids from trichilia pallida. | three new tetranortriterpenoids, methyl 6-hydroxy-11 beta-acetoxy-12 alpha-(2-methylpropanoyloxy)-3,7-dioxo-14 beta,15 beta-epoxy-1,5-meliacadien-29-oate (3), methyl 6,11 beta-dihydroxy-12 alpha-(2-methylpropanoyloxy)-3,7-dioxo-14 beta,15 beta-epoxy-1,5-meliacadien-29-oate (4), and methyl 6-hydroxy-11 beta-acetoxy-12 alpha-(2-methylbutanoyloxy)-3,7-dioxo-14 beta,15 beta-epoxy-1,5-meliacadien-29-oate (5), have been isolated from the roots of trichilia pallida. the related compounds hirtin (1) and ... | 2001 | 11520244 |
| [bioactivity of trichilia pallida swartz (meliaceae) derived molecules on tuta absoluta (meyrick) (lepidoptera: gelechiidae)]. | dichloromethane (dic) leaf and fruit extracts of trichiliapallida swartz were obtained for the isolation and identification of molecules with insecticidal activity against the tomato leafminer, tuta absoluta (meyrick). dic leaf extracts of t. pallida yielded six compounds, the triterpenes 24-methylenecycloarta-3beta-ol (trit-1), 24-methylenecycloarta-3beta-26-diol (trit-2) and cycloarta-23-eno-3beta,25-diol (trit-3), the sterols 24-methylene-3,22-dihydroxycholesterol (est-1), 24-methylenecholest ... | 2008 | 19169560 |