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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2A⋯O1	0.86	2.03	2.866 (2)	163
N2—H2B⋯O3i	0.86	2.07	2.891 (2)	158
N4—H4A⋯O4	0.86	1.99	2.810 (2)	160
N4—H4B⋯O2ii	0.86	2.14	2.980 (2)	167
C13—H13⋯Cg1iii	0.93	2.95	3.719 (3)	141

Symmetry codes: (i) ; (ii) ; (iii) −x, 1 − y, −z. Cg1 is the centroid of the N1/C20–C24 ring.