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