300px|thumb|Chemical structure of allethrin isomers 300px|thumb|Chemical structure of permethrin isomers
300px|thumb|Chemical structure of allethrin isomers 300px|thumb|Chemical structure of permethrin isomers
A pyrethroid is an organic compound similar to the natural pyrethrins, which are produced by the flowers of pyrethrums (Chrysanthemum cinerariaefolium and C. coccineum). Pyrethroids are used as commercial and household insecticides.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).