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