Ethyl 3-nitro-4-(trifluoromethoxy)pyridine-2-acetate
Ethyl 3-nitro-2-(trifluoromethoxy)pyridine-6-acetate
Ethyl 3-nitro-2-(trifluoromethoxy)pyridine-4-acetate
Ethyl 6-nitro-2-(trifluoromethoxy)pyridine-3-acetate
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