title: Activity-guided isolation of antioxidants from the roots of Rheum emodi.
abstract: An activity-guided isolation and purification process was used to identify the DPPH free radical scavenging components of Rheum emodi. The activity-guided isolation revealed that eugenol, gallic acid, quercetin, rutin, epicatechin, desoxyrhapontigenin, rhapontigenin and mesopsin are the major phenolic compounds responsible for the antioxidant activity of the roots of R. emodi.
authors.affiliation: Bio-Organic Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India.
authors.forename: Pradeep Pratap
authors.initials: PP
authors.lastname: Singh
authors.lastname: Ambika
authors.forename: S M S
authors.initials: SM
authors.lastname: Chauhan
mesh_terms: D000975:Antioxidants / Q000737:chemistry* / Q000302:isolation & purification*; D001713:Biphenyl Compounds / Q000737:chemistry; D016166:Free Radical Scavengers / Q000737:chemistry; D010636:Phenols / Q000737:chemistry; D010851:Picrates / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry*; D012250:Rheum / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010636:Phenols; D010851:Picrates; C004931:1,1-diphenyl-2-picrylhydrazyl