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