Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| C9H9O2i | 0.90(3) | 2.42(4) | 3.305(5) | 170(4) |
| C14H14O4ii | 0.93 | 2.52 | 3.286(4) | 140 |
| C16H16CO1iii | 0.96 | 2.45 | 3.407(6) | 174 |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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