| Benzophenones and flavonoids from Hypericum maculatum and their antioxidant activities. | |
| | |
MedLine Citation:
|
PMID: 22077203 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
The occurrence of three known benzophenones, namely annulatophenonoside, acetylannulatophenonoside and annulatophenone as well as a flavonol O-glycoside guajaverin in the aerial parts of Hypericum maculatum Crantz was established. In addition, hyperoside, isoquercitrin and miquelianin were isolated from this plant, as well. Radical scavenging and antioxidant activities of the isolated compounds were examined using 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) diammonium salt (ABTS) free radicals, ferric reducing antioxidant power (FRAP) assay and inhibition of lipid peroxidation in linoleic acid system by the ferric thiocyanate method. Isoquercitrin demonstrates the highest DPPH radical scavenging (96.6 ± 0.3%), FRAP (23.8 ± 0.2 Trolox equivalent, TE mol(-1)) and antioxidant activity in linoleic acid system. Guajaverin and acetylannulatophenonoside show significantly strong ABTS radical scavenging activity (93.9 ± 0.4% and 93.4 ± 0.6%, respectively), which is comparable to that of ascorbic acid (96.2 ± 0.4%). |
| | |
Authors:
|
Dimitrina Zheleva-Dimitrova; Paraskev Nedialkov; Ulrich Girreser; Gerassim Kitanov |
Related Documents
:
|
9933033 - Inhibition of leukocyte 5-lipoxygenase by phenolics from virgin olive oil. 15862673 - Evaluation of in vitro effects of natural substances of plant origin using a model of p... 1741693 - The effects of human salivary cystatins and statherin on hydroxyapatite crystallization. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-11-11 |
Journal Detail:
|
Title: Natural product research Volume: - ISSN: 1478-6427 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
|
Created Date: 2011-11-14 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101167924 Medline TA: Nat Prod Res Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
a Department of Pharmacognosy, Faculty of Pharmacy , Medical University of Sofia , Dunav str. 2 , 1000 Sofia , Bulgaria. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Surfactant volume is an essential element in human toxicity in acute glyphosate herbicide intoxicati...
Next Document: Emigration from the british isles to the u.s.a. In 1831.