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