Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| N7—H7⋯O27i | 0.86 (2) | 1.99 (2) | 2.813 (2) | 160 (2) |
| N25—H25⋯O17ii | 0.84 (2) | 2.38 (2) | 3.062 (2) | 140 (2) |
| C4—H4⋯O18 | 0.95 | 2.40 | 3.047 (3) | 125 |
Symmetry codes: (i) 
; (ii) 
.
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