16-Isopropyl-5,9-dimethyl­tetra­cyclo­[10.2.2.0^1,10.0^4,9]hexa­dec-15-ene-5,13,14-tricarboxylic acid dimethyl­formamide disolvate

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.

21-(3-Carboxy­propano­yl)-11β,17-dihydroxy­pregn-4-ene-3,20-dione monohydrate

In the title compound, C₂₅H₃₄O₈·H₂O, the two crylohexane rings adopt chair conformations. In the crystal, the organic mol­ecule and the water mol­ecule are linked by O—H...O hydrogen bonds, generating a three-dimensional network.