Reaction of diethyl acetamidomalonate with sodium ethoxide to form enolate anion 1; The enolate anion acts as a nucleophile in an SN2 reaction with alkyl iodide 2 to form alkylated intermediate 2; Heating in the presence of aqueous acid hydrolyzes both the ester and the amide bonds, and induces decarboxylation to form alanine. Draw the structure of enolate anion 1.

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