Ethyl 4-amino-3-(difluoromethyl)-2-(trifluoromethyl)pyridine-5-carboxylate
Methyl 5-amino-2-(difluoromethyl)-3-(trifluoromethyl)pyridine-4-acetate
Methyl 4-amino-5-(difluoromethyl)-3-(trifluoromethyl)pyridine-2-acetate
6-Amino-3-(difluoromethyl)-2-(trifluoromethyl)pyridine-4-carboxylic acid