Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| N1H1O7i | 0.87(1) | 2.03(1) | 2.8683(17) | 164(2) |
| N3H3O4ii | 0.86(1) | 2.00(1) | 2.8451(16) | 170(2) |
| O7H7O2iii | 0.84(2) | 1.98(2) | 2.8055(15) | 169(2) |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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