Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| O13H13N9i | 0.82 | 2.17 | 2.9352(15) | 156 |
| C2H2O10ii | 0.93 | 2.46 | 3.2328(17) | 141 |
| C7H7CO15iii | 0.96 | 2.58 | 3.175(2) | 121 |
| C18H18O10i | 0.93 | 2.54 | 3.4183(17) | 158 |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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