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