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