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