Table 2. Hydrogen-bond geometry (, ) for (II) .
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| N1H1NO1i | 0.86(2) | 2.35(2) | 3.182(3) | 161(2) |
| O2H2OO1ii | 0.84(3) | 1.83(3) | 2.673(3) | 177(1) |
Symmetry codes: (i) 
; (ii) 
.
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