(±)-(3′aα,4′α,6′aα)-3′,3′a,4′,6′a-tetrahydro-5,5,N,N-tetramethylspiro[1,3-dioxane-2,2′(1′H)-pentalene]-4′-acetamide, a triclinic crystal structure with local monoclinic pseudosymmetry

The crystal packing in the title compound, C17H27NO3, shows layers with local pseudo-monoclinic symmetry. The two independent molecules are related by local non-crystallographic glide planes and screw axes. Adjacent layers are displaced by a distance of about 1.61 Angstrom in the a direction, resulting in an overall triclinic symmetry of the structure.