Table 2. π–π inter­actions (Å) with centroid–centroid distances less than 4 Å.

Cg4, Cg5,Cg9 and Cg10 are the centroids of the N1/C1/C6/N2/C7, N4/C13/N5/C19/C14, C1–C6 and C14–C19 rings, respectively.

Cg(I)⋯Cg(J)	Cg⋯Cg distance	Slippage
Cg4⋯Cg9i	3.596 (3)	1.204
Cg5⋯Cg10iii	3.585 (3)	1.311
Cg10⋯Cg10iii	3.907 (3)	2.033

Symmetry codes: (i) −x + 1, −y, −z; (iii) −x + 1, −y + 1, −z + 1.