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