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Quinic acid esters and sesquiterpenes from Sonchus arvensis

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Title: Quinic acid esters and sesquiterpenes from Sonchus arvensis
Authors: Xu, Yang-Jun1, Sun, Shao-Bo2, Sun, Li-Mei1, Qiu, Dong-Feng1, Liu, Xiu-Jin1, Jiang, Zhi-Bo1, Yuan, Cheng-Shan1 yuancs@lzu.edu.cn
Source: Food Chemistry. Nov2008, Vol. 111 Issue 1, p92-97. 6p.
Subjects: Esters, Sesquiterpenes, Sow thistles, Botanical chemistry
Abstract: Abstract: A phytochemical study on the whole plant of Sonchus arvensis and its antioxidant activity has been carried out. Three quinic acid derivatives (1–3), the rarely naturally occurring (p-hydroxyphenylacetyl) quinic acids, and two eudesmanolides (4 and 5) were newly found. Four known eudesmanolides (6–9) were isolated from the plant for the first time. Their structures were characterized by HRESIMS, IR, UV, 1D NMR, and 2D NMR. 1,1-Diphenyl-2-picrylhydrazyl (DPPH·)-scavenging activity was evaluated for each of the above 9 compounds (1–9) in comparison to standard antioxidants (caffeic acid and ascorbic acid). However, none proved to have a positive activity. The absence of antioxidant activity could be caused by the absence of ortho or para-diphenolic groups in all detected compounds, that are responsible of the activity against free radicals by an electron transfer reaction. [Copyright &y& Elsevier]
Copyright of Food Chemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 32174677
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Quinic acid esters and sesquiterpenes from Sonchus arvensis
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  Data: <searchLink fieldCode="AR" term="%22Xu%2C+Yang-Jun%22">Xu, Yang-Jun</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sun%2C+Shao-Bo%22">Sun, Shao-Bo</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Sun%2C+Li-Mei%22">Sun, Li-Mei</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Qiu%2C+Dong-Feng%22">Qiu, Dong-Feng</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Liu%2C+Xiu-Jin%22">Liu, Xiu-Jin</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jiang%2C+Zhi-Bo%22">Jiang, Zhi-Bo</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yuan%2C+Cheng-Shan%22">Yuan, Cheng-Shan</searchLink><relatesTo>1</relatesTo><i> yuancs@lzu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Food+Chemistry%22">Food Chemistry</searchLink>. Nov2008, Vol. 111 Issue 1, p92-97. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Esters%22">Esters</searchLink><br /><searchLink fieldCode="DE" term="%22Sesquiterpenes%22">Sesquiterpenes</searchLink><br /><searchLink fieldCode="DE" term="%22Sow+thistles%22">Sow thistles</searchLink><br /><searchLink fieldCode="DE" term="%22Botanical+chemistry%22">Botanical chemistry</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract: A phytochemical study on the whole plant of Sonchus arvensis and its antioxidant activity has been carried out. Three quinic acid derivatives (1–3), the rarely naturally occurring (p-hydroxyphenylacetyl) quinic acids, and two eudesmanolides (4 and 5) were newly found. Four known eudesmanolides (6–9) were isolated from the plant for the first time. Their structures were characterized by HRESIMS, IR, UV, 1D NMR, and 2D NMR. 1,1-Diphenyl-2-picrylhydrazyl (DPPH·)-scavenging activity was evaluated for each of the above 9 compounds (1–9) in comparison to standard antioxidants (caffeic acid and ascorbic acid). However, none proved to have a positive activity. The absence of antioxidant activity could be caused by the absence of ortho or para-diphenolic groups in all detected compounds, that are responsible of the activity against free radicals by an electron transfer reaction. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Food Chemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.foodchem.2008.03.028
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      – Code: eng
        Text: English
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      – SubjectFull: Esters
        Type: general
      – SubjectFull: Sesquiterpenes
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      – SubjectFull: Sow thistles
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      – SubjectFull: Botanical chemistry
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            NameFull: Liu, Xiu-Jin
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              Text: Nov2008
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              Y: 2008
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