5-Amino-4-cyano-3-(difluoromethyl)-2-(trifluoromethoxy)pyridine
6-Amino-2-cyano-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine
2-Amino-3-cyano-6-(difluoromethyl)-5-(trifluoromethoxy)pyridine
5-Amino-4-cyano-3-(fluoromethyl)-2-(trifluoromethoxy)pyridine