3-Amino-4-(chloromethyl)-6-(trifluoromethoxy)pyridine-2-acetic acid
2-Amino-6-(chloromethyl)-3-(trifluoromethoxy)pyridine-5-acetic acid
3-Amino-6-methoxy-4-(trifluoromethoxy)pyridine-2-acetic acid
4-Amino-3-methoxy-2-(trifluoromethoxy)pyridine-5-acetic acid