Table 2. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| O7—H7⋯N2 | 0.82 | 1.87 | 2.5859 (19) | 145 |
| C9—H9⋯O3i | 0.93 | 2.54 | 3.217 (2) | 130 |
| C18—H18C⋯O3ii | 0.96 | 2.56 | 3.438 (2) | 152 |
Symmetry codes: (i) 
; (ii) 
.
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