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falcarinol

n. A natural polyacetylene pesticide and fatty alcohol found in carrots, red ginseng, and ivy.

Wikipedia
Falcarinol

Falcarinol (carotatoxin) is a natural pesticide and fatty alcohol found in carrots ( Daucus carota), red ginseng (Panax ginseng) and ivy. In carrots, it occurs in a concentration of approximately 2 mg/kg. As a toxin, it protects roots from fungal diseases, such as liquorice rot that causes black spots on the roots during storage.