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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O63i	0.86	2.00	2.851 (3)	168
N2—H2N⋯O43	0.86	2.03	2.865 (3)	163
N3—H3N⋯O23i	0.86	2.07	2.916 (3)	167
N4—H4N⋯O3	0.86	2.08	2.930 (3)	169
O2—H2A⋯O1	0.88	1.62	2.481 (3)	165
O22—H22A⋯O21	0.88	1.59	2.471 (3)	176
O42—H42A⋯O41	0.88	1.61	2.487 (3)	175
O62—H62A⋯O61	0.88	1.6	2.480 (3)	176

Symmetry code: (i) .