2014
DOI: 10.3923/pjbs.2014.999.1006
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Isolation of Hyperoside and Isoquercitrin from Camellia sasanqua as Antioxidant Agents

Abstract: Two antioxidant active compounds were isolated from the methanol extract of Camellia sasanqua using various in vitro assays: 1,1-diphenyl-2-picrylhydrazyl (DPPH), β-carotene bleaching and reducing power assays. The ethyl acetate (EtOAc) fraction of the methanol extract had the highest DPPH radical-scavenging activity with an Inhibition Concentration (IC50) value of 18.3 ± 1.63 μg mL(-1). Sephadex LH-20 column chromatography was used to separate the EtOAc fraction into eight fractions (F1-F8). Antioxidant activ… Show more

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Cited by 35 publications
(12 citation statements)
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“…However, the hexane extract from S. tuberosa leaves showed higher DPPH scavenging activity than extracts of Spondias pinnata , which showed IC 50 ranging from 0.73 to 0.59 mg/mL [ 33 ]. The hyperoside possesses DPPH scavenging activity with an IC 50 of 27.5 mM [ 34 ] and polyunsaturated fatty acids may act as antioxidants [ 35 ]. Thus, flavonoids and fatty acids may be involved in the antioxidant property of the hexane extract of S. tuberosa leaves.…”
Section: Discussionmentioning
confidence: 99%
“…However, the hexane extract from S. tuberosa leaves showed higher DPPH scavenging activity than extracts of Spondias pinnata , which showed IC 50 ranging from 0.73 to 0.59 mg/mL [ 33 ]. The hyperoside possesses DPPH scavenging activity with an IC 50 of 27.5 mM [ 34 ] and polyunsaturated fatty acids may act as antioxidants [ 35 ]. Thus, flavonoids and fatty acids may be involved in the antioxidant property of the hexane extract of S. tuberosa leaves.…”
Section: Discussionmentioning
confidence: 99%
“…Some studies have indicated that hyperoside is the major flavonoid of Z. bungeanum leaves ( 12 15 ). Pharmacological investigations have demonstrated that hyperoside have diverse biological activities such as antioxidant ( 12 , 16 ), anticancer ( 17 ), anti-inflammatory ( 18 ), anticoagulant ( 19 ) and cardioprotective activities ( 20 ). Moreover, hyperoside has been found to play crucial roles in rat lens aldose reductase inhibition ( 21 ).…”
Section: Introductionmentioning
confidence: 99%
“…Based on these results, the F-EtOAc leaf fraction was separated by column chromatography to obtain a flavonoid glycoside, isoquercitrin (7.3 mg); the structure is shown in Figure 2. The structural characterization of this compound was carried out by spectroscopic and spectrometric analyses and by comparison with published data 26,27 .…”
Section: Resultsmentioning
confidence: 99%