The title compound, 5-[4-(diethylamino)phenylmethylidene]-2,2-dimethyl-1,3-dioxane-4,6-dione, have been synthesized and its crystal structure determined. Due to the absence of hydrogen-bond donors in the structure, the crystal packing is controlled by van der Waals forces and weak C—H⋯O interactions, which associate the molecules in dimers.
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