D011722Level 7

Pyrethrins

**Definition:** The active insecticidal constituent of CHRYSANTHEMUM CINERARIIFOLIUM flowers. Pyrethrin I is the pyretholone ester of chrysanthemummonocarboxylic acid and pyrethrin II is the pyretholone ester of chrysanthemumdicarboxylic acid monomethyl ester.

**Tree numbers:** - D02.455.849.575.188.750

**Synonyms:** - Pyrethrin

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D000487Allethrins

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