Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| N1—H1N⋯O8 | 0.87 (2) | 2.22 (2) | 3.052 (4) | 163 (3) |
| N3—H3N⋯O4i | 0.85 (2) | 2.36 (2) | 3.135 (4) | 153 (4) |
Symmetry code: (i) 
.
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