Ethyl 2-chloro-3-cyano-4-(trifluoromethoxy)pyridine-5-acetate
Ethyl 3-bromo-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-acetate
Ethyl 3-bromo-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-5-acetate
Ethyl 3-bromo-6-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-acetate