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