6-Hydroxy-4-nitro-3-(trifluoromethoxy)pyridine-2-acetic acid
Ethyl 4-hydroxy-2-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-3-acetate
2-Hydroxy-4-nitro-3-(trifluoromethoxy)pyridine-5-acetic acid
Ethyl 3-hydroxy-5-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-2-acetate