title: Limonoid antifeedants from seed of Sandoricum koetjape.
abstract: An extract of the seed of Sandoricum koetjape has yielded two new limonoids, sandoricin [1] and 6-hydroxysandoricin [2]. Both compounds are effective antifeedants when incorporated into artificial diets and fed to fall armyworm (Spodoptera frugiperda) or European corn borer (Ostrina nubilalis) larvae. Reduced growth rates and increased times to pupation were evident at lower dose levels while significant mortality was noted at higher dose levels. Structures of both compounds were determined by 1H nmr, 13C nmr, and ms and confirmed by X-ray crystallography.
authors.affiliation: USDA, Agricultural Research Service, Northern Regional Research Center, Peoria, Illinois 61604.
authors.forename: R G
authors.initials: RG
authors.lastname: Powell
authors.forename: K L
authors.initials: KL
authors.lastname: Mikolajczak
authors.forename: B W
authors.initials: BW
authors.lastname: Zilkowski
authors.forename: E K
authors.initials: EK
authors.lastname: Mantus
authors.forename: D
authors.initials: D
authors.lastname: Cherry
authors.forename: J
authors.initials: J
authors.lastname: Clardy
mesh_terms: D000818:Animals; D016009:Chi-Square Distribution; D005247:Feeding Behavior / Q000187:drug effects; D007306:Insecticides / Q000737:chemistry / Q000302:isolation & purification; D007814:Larva; D036701:Limonins; D015394:Molecular Structure; D009036:Moths / Q000502:physiology; D010944:Plants / Q000032:analysis*; D012639:Seeds / Q000032:analysis; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D007306:Insecticides; D036701:Limonins; D014315:Triterpenes; C069232:sandoricin; C069233:6-hydroxysandoricin