Methyl 5-amino-2-(chloromethyl)-3-(difluoromethyl)pyridine-4-acetate
Ethyl 2-amino-6-(chloromethyl)-5-(difluoromethyl)pyridine-3-acetate
Methyl 4-amino-3-(chloromethyl)-2-(difluoromethyl)pyridine-5-acetate
3-Amino-2-(difluoromethyl)-6-(trifluoromethyl)pyridine-4-methanol