Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C2—H2B⋯O2i | 0.97 | 2.46 | 3.329 (3) | 149 |
| C7A—H7A⋯O1ii | 0.97 | 2.43 | 3.154 (4) | 131 |
Symmetry codes: (i) 
; (ii) 
.
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