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