2,9-Di-3-pentylanthra[1,9- def :6,5,10- d ′ e ′ f ′]diisoquinoline-1,3,8,10-tetrone

The asymmetric unit of the title compound, C34H30N2O4, contains four independent half-molecules, the complete molecules being generated by inversion symmetry. The molecules each have planar (within 4σ) perylenetetracarboxylic diimide fragments with bent side chains. In one of the independent molecules, each 3-pentyl fragment is disordered over two conformations in a 7:3 ratio. In the crystal, π–π interactions link molecules into stacks propagated in [010]. The crystal packing also exhibits weak intermolecular C—H...O hydrogen bonds.