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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O3	0.90 (1)	1.85 (1)	2.7520 (15)	174 (1)
O3—H3A⋯O1i	0.87 (1)	1.89 (1)	2.7518 (18)	174 (1)
O3—H3B⋯O1ii	0.86 (1)	1.94 (1)	2.8024 (18)	179 (1)

Symmetry codes: (i) ; (ii) .