Methyl 3-bromo-2-(difluoromethyl)-5-methylpyridine-4-acetate
Methyl 2-bromo-3-(bromomethyl)-4-(difluoromethyl)pyridine-6-acetate
Methyl 2-bromo-6-(difluoromethyl)-5-methylpyridine-3-acetate
Methyl 2-bromo-6-(difluoromethyl)-4-methylpyridine-3-acetate