Table 2. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| N4—H4⋯O13i | 0.86 | 2.15 | 2.973 (17) | 159 |
| N1—H1A⋯O21Aii | 0.86 | 2.17 | 2.96 (3) | 152 |
| N1—H1A⋯O21ii | 0.86 | 2.05 | 2.844 (19) | 153 |
Symmetry codes: (i) 
; (ii) 
.
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