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