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