Table 1. Hydrogen-bond geometry (, ).
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| O1H10HCl2 | 0.83(2) | 2.36(2) | 3.161(2) | 163(3) |
| C17H17Cl2i | 0.95 | 2.80 | 3.708(3) | 161 |
| C21H21O1ii | 0.95 | 2.48 | 3.275(3) | 141 |
Symmetry codes: (i) 
; (ii) 
.
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