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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—HN1⋯O1	0.85	1.94	2.789 (2)	177
O2—H1A⋯O3i	1.07	1.53	2.5770 (19)	166
N2—HN2⋯O1ii	0.86	1.93	2.772 (2)	165
N2—HN3⋯O3iii	0.89	1.93	2.793 (2)	161
N2—HN4⋯O4iv	0.97	1.88	2.827 (2)	167

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