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