Organic compound found in plants and derived from the amino acid phenylalanine. It creates the fragrance in fresh-mowed hay. More than 300 coumarins have been identified from natural sources, especially green plants. However, simple coumarins are potent antioxidants.

References for this information:

Journal of Natural Products, September 2001, issue 9, pages 1238–1240

Chemistry and Physics of Lipids, December 1999, issues 1-2, pages 125–135

General Pharmacology, June 1996, issue 4, pages 713–722

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