The Antioxidative Components from Alpinia nutans

M. Habsah Natural Products Laboratory, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia;

Nordin H. Lajis Natural Products Laboratory, Institute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor, Malaysia;

A.M. Ali Department of Biotechnology, Universiti Putra Malaysia, Serdang, Selangor, Malaysia;

M.A. Sukari Department of Chemistry, Universiti Putra Malaysia, Serdang, Selangor, Malaysia;

Y.Y. Hin Department of Chemistry, Universiti Putra Malaysia, Serdang, Selangor, Malaysia;

H. Kikuzaki Food Chemistry, Graduate School of Human Life Science, Osaka City University, Sugimoto, Sumiyoshi, Osaka, Japan

N. Nakatani Food Chemistry, Graduate School of Human Life Science, Osaka City University, Sugimoto, Sumiyoshi, Osaka, Japan

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Abstract

The methylene chloride extract of Alpinia nutans was investigated for its antioxidant constituents. 5,6-Dehydrokawain (1), flavokawin-B (2), 1,7-diphenyl-5-hydroxy-6-hepten-3-one (3), (-)-pinocembrin (4) and a mixture of stigmasterol and ß-sitosterol were isolated. The antioxidant activity was measured on isolates 1–4 using ferric thiocyanate (FTC) and diphenylpicrylhydrazyl (DPPH) free radical scavenging techniques.

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The Antioxidative Components from Alpinia nutans

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