Methyl 3-amino-2-(bromomethyl)-5-(difluoromethyl)pyridine-4-carboxylate
Methyl 3-amino-4-(bromomethyl)-2-(difluoromethyl)pyridine-5-carboxylate
6-Amino-3-(difluoromethyl)-2-methylpyridine-4-sulfonamide
Methyl 2-amino-6-(bromomethyl)-4-(difluoromethyl)pyridine-3-carboxylate