Pyrethrin is classified as:
Pyrethrin refers to mixture of six esters: pyrethrin I and II, cinerin I and II, jasmolin I and II, all sharing chrysanthemic acid monoterpene backbone esterified to rethrolone alcohol. Synthesis starts from dimethylallyl pyrophosphate via methylerythritol phosphate pathway in plastids of secretory trichomes of Tanacetum cinerariifolium flowers. Chemical skeleton built from five-carbon isoprene units classifies them as monoterpenoids, distinct from nitrogenous alkaloids or flavonoid phenylpropanoids. Insecticidal activity stems from binding to voltage-sensitive sodium channel IIS4-S5 linker, d
Ref: Casida & Quistad Pyrethrum Flowers 1995; NCBI CID 5281555 pyrethrin terpenoid; Crombie Pestic Sci 1999; Taiz secondary metabolites Ch 13.
