title: Composition of the essential oils of three Uzbek Scutellaria species (Lamiaceae) and their antioxidant activities.
abstract: The chemical composition of the essential oils obtained from aerial parts of Scutellaria immaculata Nevski ex Juz., Scutellaria ramosissima M. Pop. and Scutellaria schachristanica Juz. (Lamiaceae) growing wild in Uzbekistan was analysed by GC and GC-MS. The main constituents of the essential oils from S. immaculata were acetophenone (30.39%), eugenol (20.61%), thymol (10.04%) and linalool (6.92%), whereas constituents of the essential oils fromS. schachristanica were acetophenone (34.74%), linalool (26.98%) and eugenol (20.67%). The S. ramosissima oil is dominated by germacrene D (23.96%), β-caryophyllene (11.09%), linalool (9.63%) and hexadecanoic acid (8.34%). The essential oils of Scutellaria species exhibited weaker antioxidant effects in DPPH, ABTS and FRAP assays. In FRAP assay, only eugenol exhibited a substantial reducing power IC50= 2476.92 ± 15.8 (mM Fe(II)/g).
authors.affiliation: a Laboratory of the Chemistry of Glycosides Institute of the Chemistry of Plant Substances , Tashkent , Uzbekistan.
authors.forename: Nilufar Zokirjonovna
authors.initials: NZ
authors.lastname: Mamadalieva
authors.affiliation: b Department of Biology , Heidelberg University, Institute of Pharmacy and Molecular Biotechnology , Heidelberg , Germany.
authors.forename: Farukh
authors.initials: F
authors.lastname: Sharopov
authors.affiliation: c Department of Chemistry , University of Alabama in Huntsville , Huntsville , AL , USA.
authors.forename: Prabodh
authors.initials: P
authors.lastname: Satyal
authors.affiliation: a Laboratory of the Chemistry of Glycosides Institute of the Chemistry of Plant Substances , Tashkent , Uzbekistan.
authors.forename: Shahnoz Sadykovna
authors.initials: SS
authors.lastname: Azimova
authors.affiliation: b Department of Biology , Heidelberg University, Institute of Pharmacy and Molecular Biotechnology , Heidelberg , Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Wink
mesh_terms: D000080462:Acyclic Monoterpenes; D000975:Antioxidants / Q000737:chemistry* / Q000494:pharmacology*; D052160:Benzothiazoles / Q000737:chemistry; D001713:Biphenyl Compounds / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D039821:Monoterpenes / Q000032:analysis; D009822:Oils, Volatile / Q000737:chemistry* / Q000494:pharmacology*; D010851:Picrates / Q000737:chemistry; D010936:Plant Extracts; D000081223:Polycyclic Sesquiterpenes; D031363:Scutellaria / Q000737:chemistry*; D012717:Sesquiterpenes / Q000032:analysis; D045788:Sesquiterpenes, Germacrane / Q000032:analysis; D013451:Sulfonic Acids / Q000737:chemistry; D014610:Uzbekistan
chemical_list: D000080462:Acyclic Monoterpenes; D000975:Antioxidants; D052160:Benzothiazoles; D001713:Biphenyl Compounds; D039821:Monoterpenes; D009822:Oils, Volatile; D010851:Picrates; D010936:Plant Extracts; D000081223:Polycyclic Sesquiterpenes; D012717:Sesquiterpenes; D045788:Sesquiterpenes, Germacrane; D013451:Sulfonic Acids; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; C024714:caryophyllene; C018584:linalool; C004931:1,1-diphenyl-2-picrylhydrazyl; C027259:germacrene D
keywords: Flora of Uzbekistan; GC–MS; Scutellaria; antioxidant activity; essential oils