Ethyl 4-amino-3-(difluoromethyl)-5-methylpyridine-2-carboxylate
Ethyl 4-amino-6-(difluoromethyl)-2-methylpyridine-3-carboxylate
Methyl 2-amino-5-(aminomethyl)-3-(difluoromethyl)pyridine-6-acetate
Ethyl 4-amino-2-(difluoromethyl)-5-methylpyridine-3-carboxylate