4[4-Tert-butyl-2-(2-hydroxyethoxy)phenyl]-2-(2,2-difluorophenyl)-4,5-dihydrooxazole is a principal metabolite of Etoxazole (E936600). Etoxazole is a acaricide/insecticide that works via chitin biosynthesis inhibition for the control of mites. Used as a standard for Pesticide detection.