Methyl 4-amino-2-(difluoromethyl)-3-methoxypyridine-5-carboxylate
2-Amino-4-(difluoromethyl)-5-methoxypyridine-3-carboxylic acid
Methyl 5-amino-3-(difluoromethyl)-4-methoxypyridine-2-carboxylate
2-Amino-3-(difluoromethyl)-6-methoxypyridine-5-carboxylic acid