Insect antifeedants from tropical plants II: structure of zumsin.
Basic Information
ID: ALA3045030
Journal: J Agric Food Chem
Title: Insect antifeedants from tropical plants II: structure of zumsin.
Authors: Nihei K, Hanke FJ, Asaka Y, Matsumoto T, Kubo I.
Abstract: A novel A-seco limonoid was isolated from methanolic extract of Croton jatrophoides and designated as zumsin. This compound showed potent antifeedant activity against two lepidopteran larvae, pink bollworm, Pectinophora gossypiella (PC(50) = 1 microg/cm(2), PC(95) = 8 microg/cm(2)), and fall armyworm, Spodoptera frugiperda (PC(50) = 2 microg/cm(2), PC(95) = 16 microg/cm(2)). The structure of zumsin was determined as 1 using a variety of spectroscopic methods including nuclear magnetic resonance, mass spectrometry, and circular dichroism. The structure consists of an A'-B trans-fused ring while dumsin (2), a constituent of the same source, maintains an A'-B cis-fused ring, and suggests two unique biosynthetic processes after A ring oxidative expansion.
CiteXplore: 12188606
DOI: 10.1021/jf020245q
Patent ID: ┄