N-Carboxy-DL-phenylalanine Anhydride

The imino group N1-H1 of the five-membered ring of the title compound, C₁₀H₉NO₃, forms intermolecular hydrogen bonds between O1 along the a axis and between O3 along the b axis. Thus, a two-dimensional hydrogen-bonding network forms a layer perpendicular to the c axis. The layer, which consists of one of two independent molecules, stacks alternately along the c axis and becomes a sandwich structure.

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