Table 1. Hydrogen-bond geometry (Å, °).

Cg1 and Cg2 are the centroids of the C4B–C9B and C4A–C9A rings, respectively.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1B—H1NB⋯O1A	1.00 (2)	1.73 (2)	2.700 (2)	161 (2)
N2B—H2NB⋯O1Bi	1.02 (2)	1.72 (2)	2.738 (2)	176 (2)
N2A—H2NA⋯O1Aii	0.98 (3)	1.74 (3)	2.704 (2)	171 (2)
N1A—H1NA⋯O1Biii	0.98 (3)	1.74 (3)	2.691 (2)	162 (2)
C8A—H8AA⋯O1Aiv	0.93	2.47	3.370 (3)	163
C10A—H10C⋯Cg1iii	0.97	2.61	3.464 (2)	147
C10B—H10E⋯Cg2	0.97	2.71	3.524 (3)	142

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .