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