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