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