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