Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| C18H18AO1i | 0.96 | 2.45 | 3.350(3) | 155 |
| C8H8BO6ii | 0.97 | 2.60 | 3.529(2) | 161 |
Symmetry codes: (i) 
; (ii) 
.
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