6-Hydroxy-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxaldehyde
3-Hydroxy-2-methoxy-4-(trifluoromethoxy)-5-(trifluoromethyl)pyridine
2-Hydroxy-4-nitro-3-(trifluoromethoxy)pyridine-5-carboxaldehyde
6-Hydroxy-2-methoxy-4-(trifluoromethoxy)-3-(trifluoromethyl)pyridine