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