title: An insecticidal mixture of tetramethylcyclohexenedione isomers from Kunzea ambigua and Kunzea baxterii.
abstract: A mixture of isomers, all 4-[1-(5,7-dihydroxy-6-methyl-4-oxo-2-phenyl-chroman-8-yl)-3-methyl-butyl]-5-hydroxy-2,2,6,6-tetramethyl-cyclohex-4-en-1,3-diones, which comprises a pair of epimers, each of which is a pair of conformers, has been isolated from the hexane extract of the aerial parts of Kunzea ambigua and K. baxterii (Myrtaceae). The mixture exhibits moderate insecticidal activity in comparison with natural pyrethrum extract.
authors.affiliation: Biological Chemistry Division, IACR-Rothamsted, Harpenden, AL5 2JQ, Hertfordshire, UK. bhupinder.khambay@bbsrc.ac.uk
authors.forename: Bhupinder P S
authors.initials: BP
authors.lastname: Khambay
authors.forename: David G
authors.initials: DG
authors.lastname: Beddie
authors.forename: Monique S J
authors.initials: MS
authors.lastname: Simmonds
mesh_terms: D002867:Chromones / Q000302:isolation & purification*; D003512:Cyclohexanones / Q000302:isolation & purification*; D007306:Insecticides / Q000302:isolation & purification*; D007536:Isomerism; D027822:Myrtaceae / Q000737:chemistry*
chemical_list: C450165:4-(1-(5,7-dihydroxy-6-methyl-4-oxo-2-phenylchroman-8-yl)-3-methylbutyl)-5-hydroxy-2,2,6,6-tetramethylcyclohex-4-en-1,3-dione; D002867:Chromones; D003512:Cyclohexanones; D007306:Insecticides