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Cg1 and Cg2 are the centroids of rings O1/C2–C4/C4A–C8A and C4A/C5–C8/C8A, respectively. The offset is defined as the distance between CgI and the perpendicular projection of CgJ on ring I.
| CgI | CgJ | CgI⋯CgJ | Dihedral angle | Interplanar distance | Offset |
|---|---|---|---|---|---|
| Cg1 | Cg2i | 3.6661 (8) | 1.39 | 3.51 | 1.13 |
| Cg2 | Cg1ii | 3.6660 (8) | 1.39 | 3.49 | 1.06 |
| Cg2 | Cg2i | 3.7930 (8) | 1.69 | 3.47 | 1.50 |
| Cg2 | Cg2ii | 3.7931 (8) | 1.69 | 3.49 | 1.53 |
Symmetry codes: (i) 
; (ii) 
.
