organic compounds
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The title compound, C24H34O6·2C3H7NO, which was isolated from fumaric-modified rosin, has four asymmetrically fused six-membered rings and three carboxylic acid substituents. It contains two fused and unbridged cyclohexane rings, which form a trans ring junction with a chair conformation. The asymmetric unit includes one fumaropimaric acid and two dimethylformamide molecules. The crystal structure is stabilized through intermolecular O—HO hydrogen bonds between dimethylformamide and fumaropimaric acid.