Table 1.
NMR spetral data; NMR analysis of urdamycin X
 | |||||
|---|---|---|---|---|---|
| Position | 1H NMR (multiplicity) | 13C NMR | HMBC | COSY | NOESY |
| 1 | – | 175.8 | – | – | |
| 2ax | 2.30 (d, 13.5) | 47.5 | 1, 3, 4 | 2eq, 4ax, 4eq 2ax, 4ax, 4eq | |
| 2eq | 1.95 (dd, 13.5, 3.6) | ||||
| 3 | – | 82.6 | – | – | |
| 3-OH | 4.05 (br s) | – | – | – | 4a-OH, 12b-OH |
| 4ax | 2.22 (d, 10.2) | 48.3 | 2, 3, 4a, 12b, 14 | 2eq, 4ax, 2eq 2ax, 2ax, 4eq | |
| 4eq | 1.99 (dd, 10.2, 3.6) | ||||
| 4a | – | 78.5 | – | – | |
| 4a-OH | 4.76 (br s) | – | – | – | |
| 5ax | 1.75 (ddd, 10.5, 10.2, 6.3) | 34.1 | 4, 4a, 6, 12b | 5eq, 6ax, 6eq | |
| 5eq | 2.16 (ddd, 10.5, 10.5, 4.8) | 5ax, 6ax, 6eq | |||
| 6ax | 2.84 (ddd, 10.2, 9.9, 4.8) | 16.9 | 4a, 5, 6a, 7 | 5eq, 5ax, 6eq | |
| 6eq | 2.64 (ddd, 10.5, 9.9, 6.3) | 5ax, 6ax, 5eq | |||
| 6a | – | 123.9 | – | – | |
| 7 | – | 191.1 | – | – | |
| 7a | – | 114.7 | – | – | |
| 8 | – | 160.8 | – | – | |
| 8-OH | 12.52 (br s) | – | – | – | |
| 9 | 7.57 (dd, 7.8, 1.2) | 125.3 | 7, 7a, 9,10, 11a | 10, 11 | |
| 10 | 7.63 (t, 7.8) | 135.1 | 9, 11, 11a | 9, 11 | |
| 11 | 7.26, (dd, 7.8, 1.2) | 118.8 | 9, 10, 11a, 12 | 9, 10 | |
| 11a | – | 130.4 | – | – | |
| 12 | – | 182.2 | – | – | |
| 12a | – | 114.6 | – | – | |
| 12b | – | 86.7 | – | – | |
| 12b-OH | 9.62 (br s) | – | – | – | |
| 14 | 1.48, (s) | 19.5 | 2, 3, 4 | – | 5ax, 4ax, 2ax, 6ax |