Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| N1H1O1i | 0.90(2) | 1.88(2) | 2.7732(17) | 173.7(19) |
| N1H2O2ii | 0.92(2) | 1.92(2) | 2.8264(18) | 171.0(18) |
| N1H3O2iii | 0.90(2) | 1.94(2) | 2.7973(18) | 159.2(18) |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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