Table 1. Hydrogen-bond geometry (, ) for (I) .
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| O1H1N2 | 0.84(2) | 1.74(2) | 2.5725(12) | 177(2) |
| N2H2O1 | 0.88(2) | 1.69(5) | 2.5725(12) | 172(5) |
| C5H5O2i | 0.95 | 2.49 | 3.3427(14) | 149 |
| C8H8O2 | 0.95 | 2.53 | 3.1977(14) | 128 |
Symmetry code: (i) 
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