Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| C14H14AO2i | 0.93 | 2.57 | 3.265(4) | 132 |
| C18H18AO2ii | 0.96 | 2.45 | 3.260(4) | 141 |
Symmetry codes: (i) 
; (ii) 
.
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