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