3-Cyano-6-(difluoromethyl)-2-(trifluoromethyl)pyridine-4-carboxylic acid
4-Cyano-3-(difluoromethyl)-5-(trifluoromethyl)pyridine-2-carboxylic acid
2-(Difluoromethyl)-5-fluoro-3-hydroxypyridine-4-carboxylic acid
Ethyl 4-cyano-2-(difluoromethyl)-6-(trifluoromethyl)pyridine-3-carboxylate