4-(Difluoromethyl)-3-fluoro-2-(trifluoromethoxy)pyridine-6-carboxylic acid
3-(Difluoromethyl)-5-fluoro-6-(trifluoromethoxy)pyridine-2-carboxylic acid
2-Cyano-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-acetic acid
4-Hydroxy-2-methoxy-3-(trifluoromethoxy)pyridine-5-sulfonyl chloride