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