title: Limonoids from the leaves of Soymida febrifuga and their insect antifeedant activities.
abstract: Three new phragmalin-type limonoids (1-3) were isolated from the leaves of Soymida febrifuga together with thirteen known limonoids. The structures of these compounds were established on the basis of spectroscopic data. All these isolates were evaluated for their anti-feedant activities in tobacco caterpillar (Spodoptera litura) and castor semilooper (Achaea janata) using a no-choice laboratory bioassay. Among the tested, compounds 9 and 15 demonstrated the potent anti-feedant index (76.46 μg/cm(2), 66.61 μg/cm(2) against A. janata, and 61.69 μg/cm(2), 51.93 μg/cm(2)against S. litura).
authors.affiliation: Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 607, India.
authors.forename: P Ashok
authors.initials: PA
authors.lastname: Yadav
authors.affiliation: Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 607, India.
authors.forename: G
authors.initials: G
authors.lastname: Suresh
authors.affiliation: Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 607, India.
authors.forename: M Suri Appa
authors.initials: MS
authors.lastname: Rao
authors.affiliation: Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 607, India.
authors.forename: G
authors.initials: G
authors.lastname: Shankaraiah
authors.affiliation: Biology and Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 607, India.
authors.forename: P
authors.initials: P
authors.lastname: Usha Rani
authors.affiliation: Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 607, India. Electronic address: suresh@iict.res.in.
authors.forename: K Suresh
authors.initials: KS
authors.lastname: Babu
mesh_terms: D000818:Animals; D005247:Feeding Behavior / Q000187:drug effects*; D007313:Insecta / Q000187:drug effects*; D036701:Limonins / Q000737:chemistry* / Q000494:pharmacology*; D029582:Meliaceae / Q000737:chemistry*; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry*
chemical_list: D036701:Limonins; D010936:Plant Extracts
keywords: Antifeedant activity; Limonoids; Meliaceae; Soymida febrifuga; seco-Limonoids