title: GC-based analysis of insecticidal constituents of the flowers of Azadirachta indica A. Juss.
abstract: The present article describes the analysis of an n-hexane soluble fraction of fresh flowers of Azadirachta indica A. Juss (Neem), possessing larvicidal activity against Anopheles stephensi Liston, a vector of malarial parasite. Forty-one compounds were identified in non-polar to less-polar fraction as well as in essential oil. These identifications were basically made through GC-EIMS. Thus 5 sesquiterpenes, 3 aromatics, 17 fatty acids, 5 fatty acid esters, three steroids and 8 hydrocarbons were identified. The compounds 1-5, 10, 14-17, 21a and 36-38 were reported previously from different parts of the tree including flowers. The rest of the compounds are reported for the first time from flowers.
authors.affiliation: HEJ Research Institute of Chemistry, International Center for Chemical Sciences, WHO Collaborating Center, University of Karachi, Karachi, Pakistan. bina@khi.comsats.net.pk
authors.forename: Bina Shaheen
authors.initials: BS
authors.lastname: Siddiqui
authors.forename: Syed Tariq
authors.initials: ST
authors.lastname: Ali
authors.forename: Mohammad Tariq
authors.initials: MT
authors.lastname: Rajput
authors.forename: Tahsin
authors.initials: T
authors.lastname: Gulzar
authors.forename: Munawwer
authors.initials: M
authors.lastname: Rasheed
authors.forename: Rehana
authors.initials: R
authors.lastname: Mehmood
mesh_terms: D031601:Azadirachta / Q000737:chemistry*; D002849:Chromatography, Gas / Q000379:methods*; D005227:Fatty Acids / Q000737:chemistry; D035264:Flowers / Q000737:chemistry*; D006838:Hydrocarbons / Q000737:chemistry; D007306:Insecticides / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D012717:Sesquiterpenes / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D013256:Steroids / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry
chemical_list: D005227:Fatty Acids; D006838:Hydrocarbons; D007306:Insecticides; D010936:Plant Extracts; D012717:Sesquiterpenes; D013256:Steroids; D014315:Triterpenes