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