2-Methyl-6-nitro-5-(trifluoromethoxy)-3-(trifluoromethyl)pyridine
4-(Bromomethyl)-2-methyl-5-nitro-3-(trifluoromethoxy)pyridine
5-(Bromomethyl)-3-methyl-2-nitro-4-(trifluoromethoxy)pyridine
3-(Bromomethyl)-5-methyl-4-nitro-2-(trifluoromethoxy)pyridine