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