title: Chemical composition of the essential oil of Ligularia hodgsonii and free radical scavenging activity of the oil and crude extracts.
abstract: The chemical composition of the essential oil from roots and rhizomes of Ligularia hodgsonii was analyzed by gas chromatography (GC) and GC-mass spectrometry (MS). Forty-seven components were identified, representing 77.0% of the total oil. The main constituents were l-(+)-ascorbic acid 2,6- dihexadecanoate (15.7%), selina-6-en-4-ol (8.4%) and 9,10-dimethyl-1,2,3,4,5,6,7,8-octahydroanthracene (6.6%). The free radical scavenging activities of the essential oil, aqueous extract, ethanolic extract, and crude polysaccharides of L. hodgsonii, as well as some of their major components, were investigated using DPPH and ABTS assays. The essential oil displayed a lower capacity to quench free radicals than the extracts; the ethanolic and aqueous extracts showed considerably higher antioxidant potential that deserves further study.
authors.forename: Zihao
authors.initials: Z
authors.lastname: Zhou
authors.forename: Jun
authors.initials: J
authors.lastname: Tang
authors.forename: Xueping
authors.initials: X
authors.lastname: Song
mesh_terms: D000975:Antioxidants; D019659:Asteraceae / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000737:chemistry; D016166:Free Radical Scavengers / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D009822:Oils, Volatile / Q000737:chemistry*; D010851:Picrates / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D009822:Oils, Volatile; D010851:Picrates; D010936:Plant Extracts; D010938:Plant Oils; C004931:1,1-diphenyl-2-picrylhydrazyl