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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯O4i	0.82	1.80	2.6100 (18)	168
N1—H1N⋯O2ii	0.86	2.14	3.000 (2)	177
O2—H2⋯O4iii	0.82	1.80	2.5843 (17)	161
N1—H2N⋯O3iv	0.86	2.01	2.845 (2)	163
N3—H3N⋯O3ii	0.90 (2)	1.73 (2)	2.6276 (19)	173 (2)
C4—H4⋯N2v	0.93	2.55	3.463 (2)	166
C5—H5B⋯O1vi	0.96	2.58	3.531 (3)	171

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