Table 1.
1H-NMR and 13C-NMR (pyridine-d5) data of protodioscin.
| Position | δH (J in Hz) | δC | Position | δH (J in Hz) | δC |
|---|---|---|---|---|---|
| 1 | 37.1 | 3-O-Glc-1' | 4.96 (d, 6.60) | 100.2 | |
| 2 | 30.1 | 2' | 78.0 | ||
| 3 | 78.6 | 3' | 76.9 | ||
| 4 | 38.9 | 4' | 78.5 | ||
| 5 | 140.7 | 5' | 77.8 | ||
| 6 | 5.34 (br d, appox. 4.2) | 121.7 | 6' | 61.2 | |
| 7 | 32.1 | 2'-O-Rha-1” | 6.41 (br s) | 102.0 | |
| 8 | 31.6 | 2” | 72.5 | ||
| 9 | 50.3 | 3” | 72.7 | ||
| 10 | 37.5 | 4” | 73.9 | ||
| 11 | 21.0 | 5” | 69.5 | ||
| 12 | 39.7 | 6” | 1.77 (d, 6.60) | 18.6 | |
| 13 | 40.7 | 4'-O-Rha-1”' | 5.87 (br s) | 102.8 | |
| 14 | 56.5 | 2”' | 72.5 | ||
| 15 | 32.3 | 3”' | 72.8 | ||
| 16 | 81.3 | 4”' | 74.1 | ||
| 17 | 64.1 | 5”' | 70.4 | ||
| 18 | 0.82 (s) | 16.3 | 6”' | 1.64 (d, 6.00) | 18.5 |
| 19 | 1.05 (s) | 19.4 | 26-O-Glc-1”” | 4.87 (br s) | 104.9 |
| 20 | 40.4 | 2”” | 75.1 | ||
| 21 | 1.20 (d, 6.60) | 16.2 | 3”” | 77.9 | |
| 22 | 112.6 | 4”” | 71.7 | ||
| 23 | 30.8 | 5”” | 78.5 | ||
| 24 | 28.1 | 6”” | 62.8 | ||
| 25 | 34.2 | ||||
| 26 | 79.0 | ||||
| 27 | 1.01 (d, 6.00) | 17.1 |