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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O3—H1O3⋯O1	0.93 (4)	1.63 (3)	2.5208 (16)	159 (3)
N3—H2N3⋯O4i	0.88 (3)	2.16 (3)	2.9133 (19)	143 (2)
N2—H2N2⋯O2ii	0.87 (3)	2.15 (3)	3.0066 (18)	168 (2)
N1—H1N1⋯O1iii	0.92 (3)	1.87 (3)	2.7782 (16)	168 (3)
N2—H1N2⋯O2iii	0.88 (3)	2.12 (3)	2.9470 (18)	157 (3)
N3—H1N3⋯O2ii	0.87 (2)	2.18 (2)	3.0574 (19)	178 (3)
C7—H7B⋯O2iv	0.99	2.46	3.3532 (19)	149

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