3-Chloro-2-(difluoromethyl)-4-nitro-6-(trifluoromethoxy)pyridine
6-Chloro-3-(difluoromethyl)-2-nitro-4-(trifluoromethoxy)pyridine
2-Chloro-4-(difluoromethyl)-3-nitro-6-(trifluoromethoxy)pyridine
3-Chloro-6-(fluoromethyl)-2-nitro-5-(trifluoromethoxy)pyridine