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