6-(Fluoromethyl)-4-hydroxy-2-nitro-3-(trifluoromethoxy)pyridine
3-Hydroxy-2-methoxy-5-nitro-6-(trifluoromethoxy)pyridine
3-Hydroxy-2-methoxy-4-nitro-5-(trifluoromethoxy)pyridine
6-(Chloromethyl)-3-(difluoromethyl)-2-fluoro-4-(trifluoromethoxy)pyridine