title: The Leaf Essential Oil of Eugenia reinwardtiana Growing in Australia.
abstract: The leaf essential oils of the two chemotypes of Eugenia reinwardtiana (Blume) DC growing in Australia have been investigated. Chemotype 1, isolated in 0.2% yield, w/w, dry weight, contained major amounts of α-pinene (10-26%), limonene (1-15%), β-caryophyllene (0.7-11%), α-humulene (0.9-16%) and bicyclogermacrene (1-23%). The second chemotype, found only on coastal dunes SW of Lockerbie Qld, and isolated in 0.4-0.6% (w/w, dry weight), contained α-pinene (tr-8.5%) β-caryophyllene (12-27%) and α-humulene (1-17%) as the major terpenes. This chemotype also contained the novel aliphatic diketone, 2-butyl-2,4,4-trimethyl-5-methoxycyclohex-5-en-1,3-dione (18-33%), whose structure determination is reported herein.
authors.forename: Joseph J
authors.initials: JJ
authors.lastname: Brophy
authors.forename: John R
authors.initials: JR
authors.lastname: Clarkson
authors.forename: Myrna A
authors.initials: MA
authors.lastname: Deseo
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Ford
authors.forename: Douglas J
authors.initials: DJ
authors.lastname: Lawes
authors.forename: David N
authors.initials: DN
authors.lastname: Leach
mesh_terms: D001315:Australia; D003512:Cyclohexanones / Q000737:chemistry*; D053138:Cyclohexenes / Q000737:chemistry*; D000068856:Eugenia / Q000737:chemistry*; D000077222:Limonene; D015394:Molecular Structure; D000081222:Monocyclic Sesquiterpenes; D009822:Oils, Volatile / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry*; D012717:Sesquiterpenes / Q000737:chemistry*; D013729:Terpenes / Q000737:chemistry*
chemical_list: C000603710:2-butyl-2,4,4-trimethyl-5-methoxycyclohex-5-en-1,3-dione; D003512:Cyclohexanones; D053138:Cyclohexenes; D000081222:Monocyclic Sesquiterpenes; D009822:Oils, Volatile; D010938:Plant Oils; D012717:Sesquiterpenes; D013729:Terpenes; C042686:humulene; D000077222:Limonene