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