Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| N3H3AN1i | 0.91 | 1.94 | 2.8429(17) | 169 |
| N6H6AS1ii | 0.91 | 2.55 | 3.4157(13) | 159 |
| N6H6BN4iii | 0.91 | 2.43 | 3.0059(18) | 122 |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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