Medical

chrysanthemum-carboxylic acids

chry·san·the·mum-car·box·yl·ic ac·ids

(kri-san'thĕ-mŭm-kar-bok'si-lik as'idz),
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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