title: A new phthalic acid ester from Ajuga bracteosa.
abstract: A new phthalic acid ester 1,2-benzenedicarboxylic acid bis(2S-methyl heptyl) ester (1) was isolated from the hexane extract of the whole plant of Ajuga bracteosa. In addition, chloroform and methanol extracts yielded neo-clerodane diterpene ajugarin-I and two iridoid glycosides, reptoside and 8-O-acetyl harpagide. The structures of all the compounds were confirmed by extensive spectroscopic analysis. From the two oily fractions nine and six volatile constituents respectively were identified by GCMS. Linalyl acetate was found to be common in both the oil fractions. This plant is a new source of linalyl acetate, a valuable perfumery compound.
authors.affiliation: Department of Natural Plant Products, Institute of Himalayan Bioresource Technology, Post Box No. 6, Palampur-176061 (HP), India.
authors.forename: Narendra
authors.initials: N
authors.lastname: Singh
authors.forename: Umar
authors.initials: U
authors.lastname: Mahmood
authors.forename: V K
authors.initials: VK
authors.lastname: Kaul
authors.forename: Leopold
authors.initials: L
authors.lastname: Jirovetz
mesh_terms: D031328:Ajuga / Q000737:chemistry*; D004224:Diterpenes / Q000302:isolation & purification; D004952:Esters / Q000737:chemistry / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010795:Phthalic Acids / Q000737:chemistry / Q000302:isolation & purification*; D010936:Plant Extracts / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared
chemical_list: D004224:Diterpenes; D004952:Esters; D006027:Glycosides; D010795:Phthalic Acids; D010936:Plant Extracts