3d image of pyrethrin ii skeletal formula

pyrethrin pyrethrin ii chrysanthemum cinerariifolium insecticidal repellent insecticide mosquito herbal phytochemical phytotherapy plant herb natural herbalism pharmacognosy pharmacopoeia insects flowers organic adjuvants pyrethrum perennial terpenoid biosynthesis persian powder voltage-gated sodium channels insect mosquitoes fleas ticks crops livestock pets ants spiders lice toxicity chronic toxicity cell biology biochemistry biomolecule bioactive biochemical 3d molecule molecular formula