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