16-Isopropyl-5,9-dimethyltetracyclo[10.2.2.01,10.04,9]hexadec-15-ene-5,13,14-tricarboxylic acid dimethylformamide disolvate

Abstract

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—H...O hydrogen bonds between dimethylformamide and fumaropimaric acid.