Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| N1H1O2i | 0.86 | 1.99 | 2.846(1) | 175 |
| C7H7AO2i | 0.97 | 2.55 | 3.395(2) | 145 |
Symmetry code: (i) 
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