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首页> 外文期刊>Journal of Agricultural and Food Chemistry >In Vitro Activity-Guided Identification of Antioxidants in Aged Garlic Extract
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In Vitro Activity-Guided Identification of Antioxidants in Aged Garlic Extract

机译:大蒜提取物中抗氧化剂的体外活性指导鉴定

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Activity-guided fractionation was applied on an aged garlic extract (AGE), reported to show strong antioxidant activity, in order to locate the key in vitro antioxidant ingredients by means of the hydrogen peroxide scavenging (HPS) assay as well as the ORAC assay. Besides the previously reported four tetrahydro-β-carbolines, (1R,3S)- and (1S,3S)-1-methyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylic add and (1R,3S)- and (1S,3S)-1-methyl-1,2,3,4-tetrahydro-β-carboline-1,3-dicarboxylic acid, LC-MS/MS, LC-TOF-MS, and 1D/2D-NMR experiments led to the identification of coniferyl alcohol and its dilignols (—)-(2R,3S)-dihydrodehydrodiconiferyl alcohol, (+)-(2S,3R)-dehydrodiconiferyl alcohol, erythro-guaiacylglycerol-β-O-4'-con-iferyl ether, and threo-guaiacylglycerol-β-O-4'-coniferyl ether as the major antioxidants in AGE. The purified individual compounds showed high antioxidant activity, with EC_(50) values of 9.7—11.8 μM (HPS assay) and 2.60—3.65 μmol TE/μmol (ORAC assay), respectively.
机译:以活性为导向的分馏方法应用于据报道显示出较强抗氧化活性的陈年大蒜提取物(AGE),以通过过氧化氢清除(HPS)测定和ORAC测定来定位关键的体外抗氧化剂成分。除了先前报道的四种四氢-β-咔啉之外,还添加了(1R,3S)-和(1S,3S)-1-甲基-1,2,3,4-四氢-β-咔啉-3-羧酸。 3S)-和(1S,3S)-1-甲基-1,2,3,4-四氢-β-咔啉-1,3-二羧酸,LC-MS / MS,LC-TOF-MS和1D / 2D-NMR实验鉴定了松柏油醇及其二木酚(-)-(2R,3S)-二氢脱氢二松柏油醇,(+)-(2S,3R)-脱氢二松柏油醇,赤-愈创甘油甘油-β-O-4' -松香油基醚和苏-愈创甘油基甘油-β-O-4'-松香油基醚是AGE中的主要抗氧化剂。纯化的单个化合物显示出高抗氧化活性,EC_(50)值为9.7-11.8μM(HPS测定)和2.60-3.65μmolTE /μmol(ORAC测定)。

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