6-Cyano-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-carboxylic acid
2-Cyano-3-(difluoromethyl)-6-(trifluoromethoxy)pyridine-5-carboxylic acid
Methyl 5-cyano-2-(difluoromethyl)-4-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 5-cyano-4-(difluoromethyl)-2-(trifluoromethoxy)pyridine-3-carboxylate