2-(Bromomethyl)-4-(difluoromethyl)-6-methylpyridine-3-carboxylic acid
6-(Bromomethyl)-4-(difluoromethyl)-3-methylpyridine-2-carboxylic acid
2-(Bromomethyl)-4-(difluoromethyl)-5-methylpyridine-3-carboxylic acid
2-(Bromomethyl)-4-(difluoromethyl)-3-methylpyridine-6-carboxylic acid