pyrethrin I [ 2,2-dimenthyl-3-(2-methyl-1-propenyl) cyclopropanecarboxylic acid 2-methyl-4-oxo- 3-(2,4-pentadienyl)-2-cylopenten- 1-yl ester | chrysanthemummonocarboxylic acid pyrethrolone ester ]
pyréthrine I [ chrysanthèmemonocarboxylate de pyréthrolone | chrysantanthèmemonocarboxylate de méthyl 2 (pentadiényl 2'4') 3 cyclopentanone 4 ]