Abstract
Four triterpenoids bearing α,β-unsaturated A-ring functionality have been prepared from betulin, an abundant and readily isolated triterpene found in the bark of birch (Betula spp.). These compounds were evaluated as antifeedants in laboratory leaf-disk choice assays against bollworm larvae, Heliothis zea. One triterpenoid, 19(β,28-epoxy-2-(β-D-glucopyranosyloxy)-18α-olean-l-en-3-one (VIII), was found to display high antifeedant activity.
Original language | English (US) |
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Pages (from-to) | 493-496 |
Number of pages | 4 |
Journal | Journal of Agricultural and Food Chemistry |
Volume | 38 |
Issue number | 2 |
DOIs | |
State | Published - Jan 1 1990 |
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Agricultural and Biological Sciences(all)