Methyl 2-cyano-5-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-acetate
Methyl 2-cyano-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-5-acetate
3-Cyano-6-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-2-acetic acid
5-Cyano-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-acetic acid