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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N3—H3B⋯O2i	0.81 (4)	2.13 (4)	2.920 (3)	163 (3)
N2—H2⋯O2ii	0.80 (4)	2.00 (4)	2.800 (3)	176 (3)
O1—H1⋯N1	0.84 (2)	1.88 (3)	2.628 (3)	147 (4)

Symmetry codes: (i) ; (ii) .