Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| N1H1I1i | 0.88 | 2.80 | 3.622(2) | 156 |
| N2H2I1 | 0.88 | 2.70 | 3.5517(19) | 162 |
Symmetry code: (i) 
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