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Cg1 is the centroid of the N1/C4C8 pyrdine ring.
| DHA | DH | HA | D A | DHA |
|---|---|---|---|---|
| C4H4AF3i | 0.95 | 2.31 | 3.240(7) | 165 |
| C13H13AF4ii | 0.95 | 2.31 | 3.219(12) | 160 |
| C17H17AF3iii | 0.95 | 2.32 | 3.123(7) | 142 |
| C10H10A Cg1iv | 0.95 | 2.61 | 3.302(5) | 130 |
Symmetry codes: (i) 
; (ii) 
; (iii) 
; (iv) 
.
