Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2A—H1NA⋯O1B	0.86	2.02	2.821 (2)	155
C7A—H7AA⋯O1B	0.93	2.54	3.313 (2)	140
C12A—H12A⋯Cg1	0.93	2.75	3.632 (2)	159
N2B—H1NB⋯O1Ai	0.86	2.02	2.832 (2)	157
C7B—H7BA⋯O1Ai	0.93	2.47	3.256 (2)	143
C12B—H12B⋯Cg2i	0.93	2.65	3.462 (2)	146
C20A—H20B⋯N1Bii	0.96	2.57	3.504 (3)	164

Symmetry codes: (i) ; (ii) . Cg1 and Cg2 are the centroids of the C1B–C6B and C1A–C6A rings, respectively.