Table 2. 13C NMR (400.13 MHz for 1H, 100.61 MHz for 13C, DMSO-d6, 30°C).
Atom # | Silybin A-7,23-diyl bis(hydrogen sulphate) | Silybin B-7,23-diyl bis(hydrogen sulphate) |
2 | 82.61 | 82.57 |
3 | 71.45 | 71.50 |
4 | 197.70 | 197.71 |
4a | 100.46 | 100.48 |
5 | 163.35 | 163.34 |
6 | 96.18 | 96.15 |
7 | 167.08 | 166.99 |
8 | 95.16 | 95.13 |
8a | 162.52 | 162.51 |
10 | 76.06 | 76.06 |
11 | 75.72 | 75.71 |
12a | 143.18 | 143.14 |
13 | 116.59 | 116.70 |
14 | 130.27 | 130.28 |
15 | 121.51 | 121.31 |
16 | 116.36 | 116.40 |
16a | 143.27 | 143.23 |
17 | 127.10 | 127.11 |
18 | 111.83 | 111.77 |
19 | 147.64 | 147.64 |
20 | 147.10 | 147.07 |
21 | 115.40 | 115.37 |
22 | 120.29 | 120.27 |
23 | 64.72 | 64.70 |
19-OMe | 55.65 | 55.64 |