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