Pronunciation: kri-san'the-mum-kar-bok'si-lik as'idz
Definition: Cyclopropane carboxylic acids substituted in one position by two methyl groups, the other by 2-methyl-1-propenyl (chrysanthemum monocarboxylic acid) or by 3-methoxy-2-methyl-3-oxo-1-propenyl (chrysanthemum dicarboxylic acid methyl ester); these acids, esterified with allethrolone or pyrethrolone, are the allethrins and pyrethrins, respectively.
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