5-Amino-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-2-carboxylic acid
3-Amino-5-(difluoromethyl)-2-(trifluoromethoxy)pyridine-4-carboxylic acid
2-Amino-3-(difluoromethyl)-4-(trifluoromethoxy)pyridine-6-acetonitrile
5-Amino-4-(difluoromethyl)-3-(trifluoromethoxy)pyridine-2-carboxylic acid