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