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