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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2B⋯O5	0.90	1.96	2.843 (3)	166
N2—H2A⋯O3	0.90	1.98	2.772 (2)	146
N2—H2A⋯O4	0.90	2.37	3.022 (3)	129
N4—H4A⋯O7i	0.90	2.22	3.050 (3)	153
N4—H4A⋯O5i	0.90	2.50	3.080 (3)	122
N4—H4B⋯O1	0.90	1.71	2.606 (2)	171
N4—H4B⋯O2	0.90	2.55	3.051 (3)	116

Symmetry code: (i) .