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