Ethyl 2-amino-6-(difluoromethyl)-4-(trifluoromethyl)pyridine-3-acetate
Ethyl 3-amino-6-(difluoromethyl)-4-(trifluoromethyl)pyridine-2-acetate
4-Bromo-3-chloro-2-(difluoromethyl)pyridine-5-carboxaldehyde
Ethyl 2-amino-5-(difluoromethyl)-4-(trifluoromethyl)pyridine-3-acetate