N,N'-Ethyl­enedisuccin­imide

The title compound, C₁₀H₁₂N₂O₄, crystallizes as discrete mol­ecules disposed about crystallographic centres of symmetry, with two independent half-mol­ecules constituting the asymmetric unit of the unit cell. The succin­imide rings are essentially planar. No unusual features are observed in the molecular geometry.

Succinimido 4-(N-maleimido­methyl)­cyclo­hexane­carboxyl­ate

The title compound {alternative name: 2,5-dioxo-3-pyrrolidin-1-yl 4-[(2,5-dioxo-3-pyrrolin-1-yl)­methyl]­cyclo­hexane­car­box­yl­ate}, C₁₆H₁₈N₂O₆, crystallizes as discrete mol­ecules separated by normal van der Waals interactions. The succin­imide ester and male­imide subunits occupy equatorial positions on the cyclo­hexane ring.