Ethyl 5-amino-3-(difluoromethyl)-2-fluoropyridine-4-carboxylate
Ethyl 3-amino-5-(difluoromethyl)-4-fluoropyridine-2-carboxylate
Methyl 3-amino-2-(difluoromethyl)-5-fluoropyridine-6-acetate
Ethyl 5-amino-4-(difluoromethyl)-2-fluoropyridine-3-carboxylate