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