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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H11⋯N2i	0.90 (1)	2.38 (2)	3.086 (2)	136 (2)
N1—H11⋯N2ii	0.90 (1)	2.55 (2)	3.250 (2)	136 (2)
N3—H31⋯O4iii	0.89 (1)	2.12 (1)	2.9327 (16)	151 (2)
N3—H31⋯O3iii	0.89 (1)	2.38 (2)	3.0709 (18)	134 (2)

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