2-Bromo-4-(difluoromethyl)pyridine-6-carboxylic acid
4-(Chloromethyl)-6-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-carboxylic acid
2-Bromo-3-(difluoromethyl)pyridine-6-carboxylic acid
3-(Chloromethyl)-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-5-carboxaldehyde