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