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