TABLE 4.
1H NMR chemical shifts calculated with DU8+a
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|---|---|---|---|---|---|---|---|---|---|
| Position | Wu et al 1H δ, ppm13 | 3 δ, ppm | Δ(3-reported), ppm | 4 δ, ppm | Δ(4-reported), ppm | 5 δ, ppm | Δ(5-reported), ppm | 6 δ, ppm | Δ(6-reported), ppm |
| 1 | |||||||||
| 2 | |||||||||
| 3 | 4.48 | 4.74 | 0.26 | 4.73 | 0.25 | 4.77 | 0.29 | 4.70 | 0.22 |
| 4 | |||||||||
| 5 | 2.97 | 2.51 | −0.46 | 3.15 | 0.18 | 2.51 | −0.46 | 3.15 | 0.18 |
| 6α | 2.58 | 2.71 | 0.13 | 2.56 | −0.02 | 2.72 | 0.14 | 2.57 | −0.01 |
| 6β | 2.98 | 3.03 | 0.05 | 2.93 | −0.05 | 3.03 | 0.05 | 2.95 | −0.03 |
| 7 | |||||||||
| 8 | |||||||||
| 9 | |||||||||
| 10 | |||||||||
| 11α | 3.10 | 3.23 | 0.13 | 3.23 | 0.13 | 3.18 | 0.08 | 3.19 | 0.09 |
| 11β | 3.20 | 3.17 | −0.03 | 3.19 | −0.01 | 3.24 | 0.04 | 3.24 | 0.04 |
| 12α | 1.87 | 1.83 | −0.04 | 1.84 | −0.03 | 1.82 | −0.05 | 1.80 | −0.07 |
| 12β | 1.75 | 1.87 | 0.12 | 1.86 | 0.11 | 1.90 | 0.15 | 1.88 | 0.13 |
| 13 | |||||||||
| 14 | |||||||||
| 15 | 6.57 | 6.41 | −0.16 | 6.34 | −0.23 | 6.46 | −0.11 | 6.38 | −0.19 |
| 16 | |||||||||
| 17 | 5.22 | 5.31 | 0.09 | 5.30 | 0.08 | 5.29 | 0.07 | 5.29 | 0.07 |
| 18b | 1.15 | 1.37 | 0.22 | 1.35 | 0.20 | 1.37 | 0.22 | 1.37 | 0.22 |
| 19b | 1.83 | 1.78 | −0.05 | 1.92 | 0.09 | 1.77 | −0.06 | 1.91 | 0.08 |
| 20 | |||||||||
| 21 | 7.56 | 7.62 | 0.06 | 7.62 | 0.06 | 7.61 | 0.05 | 7.61 | 0.05 |
| 22 | 6.52 | 6.63 | 0.11 | 6.63 | 0.11 | 6.64 | 0.12 | 6.64 | 0.12 |
| 23 | 7.48 | 7.62 | 0.14 | 7.63 | 0.15 | 7.62 | 0.14 | 7.61 | 0.13 |
| 28b | 1.16 | 1.26 | 0.10 | 1.36 | 0.20 | 1.25 | 0.09 | 1.37 | 0.21 |
| 29b | 0.83 | 0.95 | 0.12 | 0.98 | 0.15 | 0.96 | 0.13 | 0.98 | 0.15 |
| 30 | 8.05 | 8.62 | 0.57 | 8.19 | 0.14 | 8.63 | 0.58 | 8.20 | 0.15 |
| MAE | 0.16 | 0.12 | 0.16 | 0.12 | |||||
| RMSD | 0.21 | 0.14 | 0.21 | 0.14 | |||||
| Max | 0.57 | 0.25 | 0.58 | 0.22 | |||||
Chemical shifts with an absolute deviation greater than 0.20 ppm are colored in red.
1H shifts of homotopic protons were averaged.
