1,1′′-Bis(prop-2-en-1-yl)-1,1′′,2,2′′-tetrahydrodispiro[indole-3,7′-[6,9]diazatricyclo[7.3.0.0 2,6 ]dodecane-8′,3′′-indole]-2,2′′-dione

The molecule of the title compound, C 30 H 32 N 4 O 2 , lies on a twofold rotation axis that passes through the mid-points of the C—C bonds of the piperazine ring, which adopts a chair conformation. The pyrrolidine ring that is fused to the piperazine ring adopts an envelope conformation (in which the N atom represents the flap). The indoline fused-ring system is nearly planar (r.m.s. deviation = 0.044 Å); the two symmetry-related indoline fused-rings systems are aligned at 71.44 (3)°.