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