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