Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| C1H1BO2i | 0.96 | 2.49 | 3.366(6) | 152 |
| C8H8O2ii | 0.98 | 2.46 | 3.323(6) | 146 |
Symmetry codes: (i) 
; (ii) 
.
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