Methyl 4-amino-3-cyano-2-(difluoromethyl)pyridine-5-carboxylate
6-Amino-2-bromo-3-(difluoromethyl)-4-(trifluoromethyl)pyridine
2-Amino-5-bromo-4-(difluoromethyl)-3-(trifluoromethyl)pyridine
Methyl 4-amino-6-cyano-3-(difluoromethyl)pyridine-2-carboxylate