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