title: Mosquitocidal triterpenes from the stem of Duranta repens.
abstract: Two triterpenes, beta-amyrin and 12-oleanene 3beta, 21beta-diol, were isolated as a mixture from the chloroform soluble fraction of an ethanol extract of Duranta repens Linn (Verbenaceae) stem. The structures of the two compounds were confirmed by analysis of their IR, (1)H-NMR, (13)C-NMR and LC-MS spectral data. The mixture of beta-amyrin and 12-oleanene 3beta, 21beta-diol (compound 1) was highly effective against the larvae of the mosquito, Culex quinquefasciatus Say (Diptera: Culicidae), as a mosquitocide.
authors.affiliation: Department of Biochemistry and Molecular Biology, University of Rajshahi, Bangladesh.
authors.forename: Farjana
authors.initials: F
authors.lastname: Nikkon
authors.forename: Kazi Abdus
authors.initials: KA
authors.lastname: Salam
authors.forename: Tanzima
authors.initials: T
authors.lastname: Yeasmin
authors.forename: Ashik
authors.initials: A
authors.lastname: Mosaddik
authors.forename: Proma
authors.initials: P
authors.lastname: Khondkar
authors.forename: M Ekramul
authors.initials: ME
authors.lastname: Haque
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D003465:Culex / Q000254:growth & development; D007305:Insecticide Resistance; D007306:Insecticides / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification; D007814:Larva; D007928:Lethal Dose 50; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D009032:Mosquito Control; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D015203:Reproducibility of Results; D013055:Spectrophotometry, Infrared; D013997:Time Factors; D014315:Triterpenes / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification; D029648:Verbenaceae / Q000737:chemistry*
chemical_list: C553568:12-oleanene-3beta,21beta-diol; D007306:Insecticides; D010936:Plant Extracts; D014315:Triterpenes; D009828:Oleanolic Acid; C036380:beta-amyrin