Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C21—H21B⋯O2i | 0.98 | 2.30 | 3.276 (3) | 176 |
Symmetry code: (i) 
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