title: [Studies on antioxidant constituents from black tea].
abstract: Qimen black tea has strong inhibitory activity of canola oil oxidation. Four antioxidant compounds, theaflavin (TF1), theaflavin-3-gallate (TF2A), theaflavin-3'-gallate (TF2B) and theaflavin digallate (TF3), were isolated from acetic acetate extract of black tea by silica gel and sephadex LH-20 column chromatography. TF1, TF2A, TF2B and TF3, have stronger antioxidant activity than that of BHT (Butylated hydorxytoluene).
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050.
authors.forename: Yalun
authors.initials: Y
authors.lastname: Su
authors.forename: Ruoyun
authors.initials: R
authors.lastname: Chen
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Chen
mesh_terms: D000975:Antioxidants / Q000302:isolation & purification* / Q000494:pharmacology; D044946:Biflavonoids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002084:Butylated Hydroxytoluene / Q000494:pharmacology; D002392:Catechin / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002855:Chromatography, Thin Layer; D005229:Fatty Acids, Monounsaturated / Q000378:metabolism; D005707:Gallic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D015394:Molecular Structure; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology; D000074262:Rapeseed Oil; D013662:Tea / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D044946:Biflavonoids; D005229:Fatty Acids, Monounsaturated; D010936:Plant Extracts; D000074262:Rapeseed Oil; D013662:Tea; C056068:theaflavin; D002084:Butylated Hydroxytoluene; C088983:theaflavine gallate; C077197:theaflavin digallate; D005707:Gallic Acid; D002392:Catechin