- a viscous, water-insoluble liquid, C21H28O3, extracted from pyrethrum flowers, used as an insecticide.
- a like compound, C22H28O5, obtained and used similarly.
- an oily water-insoluble compound used as an insecticide. Formula: C 21 H 28 O 3
- a compound of similar chemical structure and action, also found in pyrethrum. Formula: C 22 H 28 O 5
