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