Methyl 3-hydroxy-2-nitro-6-(trifluoromethoxy)pyridine-4-carboxylate
5-Hydroxy-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-3-carboxaldehyde
3-Hydroxy-4-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-2-carboxaldehyde
Methyl 3-hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-6-carboxylate