Methyl 4-amino-2-(aminomethyl)-5-(difluoromethyl)pyridine-3-acetate
Methyl 5-amino-3-(aminomethyl)-2-(difluoromethyl)pyridine-4-acetate
Methyl 3-amino-5-(difluoromethyl)-2-methylpyridine-4-acetate
2-Amino-6-(bromomethyl)-4-(difluoromethyl)-3-(trifluoromethyl)pyridine