Table 2. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| O3H3OO2i | 0.84(1) | 2.02(4) | 2.646(3) | 131(5) |
| O4H4OO6ii | 0.85(1) | 1.79(1) | 2.618(3) | 169(4) |
Symmetry codes: (i) 
; (ii) 
.
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