Table 2. Hydrogen-bond geometry (Å, °) for (II) .
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C6—H6⋯O4i | 0.93 | 2.56 | 3.371 (4) | 146 |
| C7—H7⋯O2ii | 0.93 | 2.58 | 3.476 (4) | 161 |
| C18—H18⋯O1iii | 0.93 | 2.60 | 3.485 (5) | 160 |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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