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