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