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