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