Table 1. 1H and 13C NMR spectral data for compound N7 in DMSO-d6, N2 in CD3OH and the reference data of sydonic acid in CD3OH (500Â MHz for 1H NMR and 125Â MHz for 13C NMR)
No. | N7 | N2 | Sydonic acid | |||
|---|---|---|---|---|---|---|
δC | δH (J in Hz) | δC | δH (J in Hz) | δC | δH (J in Hz) | |
1 | 135.9 | Â | 137.9 | Â | 138.0 | Â |
2 | 154.7 | Â | 157.0 | Â | 156.9 | Â |
3 | 115.1 | 7.24 (1H, d, 1.35) | 118.7 | 7.37 (1H, d, 1.6) | 118.6 | 7.36 (1H, d, 1.6) |
4 | 133.5 | Â | 131.6 | Â | 131.6 | Â |
5 | 117.5 | 7.28 (1H, dd, 1.35, 8.05) | 121.5 | 7.44 (1H, dd, 1.6, 7.9) | 121.5 | 7.43 (1H, dd, 1.6, 7.9) |
6 | 126.6 | 7.35 (1H, d, 8.05) | 127.7 | 7.25 (1H, d, 7.9) | 127.7 | 7.25 (1H, d, 7.9) |
7 | 166.1 | Â | 169.9 | Â | 169.9 | Â |
8 | 55.5 | 4.42 (1H, m) | Â | Â | Â | Â |
9 | 61.4 | 3.77 (2H, m) | Â | Â | Â | Â |
10 | 172.1 | Â | Â | Â | Â | Â |
1′ | 75.0 |  | 78.0 |  | 77.9 |  |
8′ | 28.5 | 1.51 (3H, s) | 28.9 | 1.59 (3H, s) | 29.0 | 1.59 (3H, s) |
2′ | 41.6 | 1.94 (1H, m) | 43.7 | 1.94 (1H, m) | 43.6 | 1.94 (1H, ddd, 4.5, 12.2, 13.7) |
1.66 (1H, m) | Â | 1.77 (1H, m) | Â | 1.77 (1H, ddd, 4.8, 11.6, 13.7) | ||
3′ | 21.3 | 0.99 (1H, m) | 22.9 | 1.29 (1H, m) | 22.9 | 1.18 (1H, m) |
1.27 (1H, m) | Â | 1.34 (1H, m) | Â | 1.33 (1H, m) | ||
4′ | 38.8 | 1.05 (2H, m) | 40.4 | 1.13 (2H, m) | 40.4 | 1.13 (2H, m) |
5′ | 27.3 | 1.43 (1H, m) | 28.9 | 1.47 (1H, m) | 28.8 | 1.47 (1H, m) |
6′ | 22.6 | 0.77 (6H, d, 6.6) | 22.8 | 0.81 (6H, d, 6.4) | 22.9 | 0.81 (6H, d, 6.5) |
7′ | 22.4 | 23.0 | 23.0 | |||
N–H |  | 8.15 (1H, d, 7.6) |  |  |  |  |