3-(Difluoromethyl)-2-fluoro-4-(trifluoromethoxy)pyridine-5-carboxylic acid
6-(Difluoromethyl)-3-fluoro-4-(trifluoromethoxy)pyridine-2-carboxylic acid
2-(Difluoromethyl)-3-fluoro-4-(trifluoromethoxy)pyridine-5-carboxylic acid
3-(Bromomethyl)-6-fluoro-4-hydroxy-2-(trifluoromethoxy)pyridine