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