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