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| compound | δ N–HB (ppm)b | δ N–HA (ppm)b | Δδ/ΔTN–HB(ppb/K)c CDCl3 | Δδ/ΔTN–HA(ppb/K)c CDCl3 | Δδ/ΔTN–HB(ppb/K)c DMSO-d6 | Δδ/ΔTN–HA(ppb/K)c DMSO-d6 |
|---|---|---|---|---|---|---|
| 8a | 8.03 | 5.34 | ||||
| 8d | 8.12 | 5.03 | ||||
| 8h | 7.76 | 5.78 | ||||
| 8i | 8.16 | 5.41 | ||||
| 8j | 7.71 | 5.89 | ||||
| 8n | 7.72 | 5.42 | ||||
| 8o | 7.95 | 4.99 | 22.2 | 9.1 | ||
| 8p | 8.05 | 6.39 | 40.1 | 21.3 | 4.2 | 3.8 |
| 8q | 8.57 | 5.41 | ||||
| 8r | 8.40 | 4.84 | 20.6 | 10.6 | 3.5 | 6.1 |
NMR experiments performed in 2.5 mM solutions.
NMR spectra recorded in CDCl3.
Absolute values.
