Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| N1—H1⋯N4i | 0.88 | 2.19 | 3.058 (2) | 169 |
Symmetry code: (i) 
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