Chemical and antioxidant investigations: Norfolk pine needles (Araucaria excelsa)

Helana N. Michael; Hanem M. Awad; Nabil H. El-Sayed; Paul W. Paré

doi:10.3109/13880200903177503

Chemical and antioxidant investigations: Norfolk pine needles (Araucaria excelsa)

Helana N. Michael, Hanem M. Awad, Nabil H. El-Sayed, Paul W. Paré

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Chemical investigations from a foliar extract of Araucaria excelsa (Lamb.) (Araucariaceae) resulted in the identification of seven phenolic metabolites including one flavananol, one flavananol 3-O-glycoside, four C-glycoside flavonoids, and one phenolic acid. Structures were elucidated by spectral determination including: UV, NMR and MS analysis. Moderate antioxidant activity was observed with a 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging assay in comparison with the reference antioxidant ascorbic acid.

Original language	English
Pages (from-to)	534-538
Number of pages	5
Journal	Pharmaceutical Biology
Volume	48
Issue number	5
DOIs	https://doi.org/10.3109/13880200903177503
State	Published - May 2010

Keywords

Antioxidants
Araucaria excelsa
Araucariaceae
DPPH
Flavonoids
Needles
Norfolk pine
Phenolics

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10.3109/13880200903177503

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title = "Chemical and antioxidant investigations: Norfolk pine needles (Araucaria excelsa)",

abstract = "Chemical investigations from a foliar extract of Araucaria excelsa (Lamb.) (Araucariaceae) resulted in the identification of seven phenolic metabolites including one flavananol, one flavananol 3-O-glycoside, four C-glycoside flavonoids, and one phenolic acid. Structures were elucidated by spectral determination including: UV, NMR and MS analysis. Moderate antioxidant activity was observed with a 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging assay in comparison with the reference antioxidant ascorbic acid.",

keywords = "Antioxidants, Araucaria excelsa, Araucariaceae, DPPH, Flavonoids, Needles, Norfolk pine, Phenolics",

author = "Michael, {Helana N.} and Awad, {Hanem M.} and El-Sayed, {Nabil H.} and Par{\'e}, {Paul W.}",

note = "Funding Information: This research was funded in part by the Welch Foundation (Grant D1478) and the Frasch Foundation for Chemical Research.",

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doi = "10.3109/13880200903177503",

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AU - Michael, Helana N.

AU - Awad, Hanem M.

AU - El-Sayed, Nabil H.

AU - Paré, Paul W.

N1 - Funding Information: This research was funded in part by the Welch Foundation (Grant D1478) and the Frasch Foundation for Chemical Research.

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AB - Chemical investigations from a foliar extract of Araucaria excelsa (Lamb.) (Araucariaceae) resulted in the identification of seven phenolic metabolites including one flavananol, one flavananol 3-O-glycoside, four C-glycoside flavonoids, and one phenolic acid. Structures were elucidated by spectral determination including: UV, NMR and MS analysis. Moderate antioxidant activity was observed with a 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging assay in comparison with the reference antioxidant ascorbic acid.

KW - Antioxidants

KW - Araucaria excelsa

KW - Araucariaceae

KW - DPPH

KW - Flavonoids

KW - Needles

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KW - Phenolics

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Chemical and antioxidant investigations: Norfolk pine needles (Araucaria excelsa)

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