3-Chloro-4-(difluoromethyl)-2-hydroxypyridine-5-carboxaldehyde
3-Bromo-2-(bromomethyl)-4-(difluoromethyl)pyridine-6-carboxylic acid
6-Bromo-2-(bromomethyl)-3-(difluoromethyl)pyridine-4-carboxylic acid
6-Bromo-2-(bromomethyl)-4-(difluoromethyl)pyridine-3-carboxylic acid