GC-based analysis of insecticidal constituents of the flowers of Azadirachta indica A. Juss.
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.
Siddiqui
Bina Shaheen
BS
HEJ Research Institute of Chemistry, International Center for Chemical Sciences, WHO Collaborating Center, University of Karachi, Karachi, Pakistan. bina@khi.comsats.net.pk
Ali
Syed Tariq
ST
Rajput
Mohammad Tariq
MT
Gulzar
Tahsin
T
Rasheed
Munawwer
M
Mehmood
Rehana
R
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
D005227:Fatty Acids; D006838:Hydrocarbons; D007306:Insecticides; D010936:Plant Extracts; D012717:Sesquiterpenes; D013256:Steroids; D014315:Triterpenes