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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O10	0.93 (4)	2.14 (4)	2.885 (4)	136 (4)
N1—H1N⋯O9i	0.93 (4)	2.45 (4)	3.018 (5)	119 (4)
N2—H2N⋯O2ii	0.862 (19)	2.35 (2)	3.195 (4)	166 (4)
N3—H3N⋯O8iii	0.90 (5)	2.02 (5)	2.902 (4)	164 (4)

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