3-(Difluoromethyl)-2-methyl-6-nitro-4-(trifluoromethoxy)pyridine
2-(Difluoromethyl)-6-methyl-3-nitro-5-(trifluoromethoxy)pyridine
2-(Difluoromethyl)-4-methyl-3-nitro-6-(trifluoromethoxy)pyridine
2-(Difluoromethyl)-3-methyl-4-nitro-6-(trifluoromethoxy)pyridine