2-Amino-3-chloro-4-(difluoromethyl)-5-(trifluoromethyl)pyridine
4-Amino-2-cyano-3-(difluoromethyl)-5-(trifluoromethyl)pyridine
5-Amino-3-cyano-4-(difluoromethyl)-2-(trifluoromethyl)pyridine
3-Amino-5-cyano-2-(difluoromethyl)-4-(trifluoromethyl)pyridine