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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2n⋯O1	0.88 (1)	1.87 (2)	2.602 (2)	139 (2)
N3—H3n⋯O2i	0.88 (1)	2.36 (2)	3.027 (2)	133 (2)
N3—H3n⋯O3i	0.88 (1)	2.23 (1)	3.100 (2)	171 (2)

Symmetry code: (i) .