Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| N1H1AO2i | 1.07(3) | 1.75(3) | 2.804(4) | 170(3) |
| N1H1BO1ii | 1.07(3) | 1.73(4) | 2.768(3) | 162(4) |
| N1H1CO1iii | 1.07(3) | 1.87(3) | 2.901(6) | 161(3) |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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