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