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Figure 3
The crystal packing of 4-HO-DET hydro­fumarate (left) viewed along the a-axis direction, and the crystal packing of 4-AcO-DET fumarate/fumaric acid (right) views along the a-axis direction. The hydrogen bonds (Tables 1[link] and 2[link]) are shown as dashed lines. Displacement ellipsoids are drawn at the 50% probability level. Hydrogen atoms not involved in hydrogen bonding are omitted for clarity. Only the major components of disordered residues are shown.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 82| Part 10| October 2026|
https://doi.org/10.1107/S2056989026009217