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