5-(Fluoromethyl)-2-hydroxy-3-nitro-4-(trifluoromethoxy)pyridine
4-(Fluoromethyl)-5-hydroxy-3-nitro-2-(trifluoromethoxy)pyridine
4-(Fluoromethyl)-3-hydroxy-2-nitro-5-(trifluoromethoxy)pyridine
4-(Fluoromethyl)-2-hydroxy-3-nitro-5-(trifluoromethoxy)pyridine