Methyl 3-chloro-4-nitro-5-(trifluoromethoxy)pyridine-2-acetate
Methyl 3-chloro-4-nitro-2-(trifluoromethoxy)pyridine-5-acetate
Methyl 3-chloro-2-nitro-6-(trifluoromethoxy)pyridine-4-acetate
Methyl 3-chloro-2-nitro-5-(trifluoromethoxy)pyridine-4-acetate