Table 4. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| C4H4O2 | 1.011(9) | 2.453(11) | 2.8877(6) | 105.2(6) |
| C11H11AO2 | 0.939(11) | 2.485(9) | 3.1200(7) | 125.0(8) |
| C17H17O2i | 0.972(7) | 2.530(6) | 3.4020(6) | 149.2(5) |
Symmetry code: (i) 
.
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