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Cg4 is the centroid of the C2C7 ring.
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| N2H2O6 | 0.86 | 1.00 | 2.604(3) | 127 |
| N2H2O6i | 0.86 | 2.17 | 2.910(3) | 144 |
| C6H6O2ii | 0.96 | 2.49 | 3.186(4) | 132 |
| C10H10B Cg4ii | 0.98 | 2.98 | 3.719(4) | 134 |
Symmetry codes: (i) 
; (ii) 
.
