Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| N1—H1⋯O2i | 0.86 | 1.97 | 2.7835 (18) | 157 |
| N3—H3⋯O1ii | 0.86 | 2.06 | 2.8972 (18) | 165 |
Symmetry codes: (i) 
; (ii) 
.
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