Table 1.
1D and 2D NMR data of compound 7-hyd.HC in DMSO-d6.
| Position | δH ppm (mult, J(Hz)) | δC ppm | HMBC correlations |
|---|---|---|---|
| 2 | — | 160.1 | H4 (8.15) |
| 3 | — | 122.4 | CH3 (2.32); H4 (8.15) |
| 3' | — | 154.4 | CH3 (2.32); H4 (8.15); NH(10.78) |
| 4 | 8.15 (s, 1H, H4) | 142.7 | H5 (7.57) |
| 4a | — | 111.6 | H4 (8.15); H5 (7.57); H6 (6.83); H8 (6.76) |
| 5 | 7.57 (d, J = 8.4 Hz, 1H, H5) | 131.1 | H4 (8.15); H6 (6.83) |
| 6 | 6.83 (d, J = 8.4 Hz, 1H, H6) | 114.1 | H5 (7.57); H8 (6.76) |
| 7 | 10.78 (s, 1H, OH) | 162.4 | H5 (7.57); H6 (6.83); H8 (6.76) |
| 8 | 6.76 (s, 1H, H8) | 102.3 | H6 (6.83) |
| 8a | — | 156.0 | H4 (8.15); H5 (7.57); H8 (6.76) |
| 9 | — | 164.5 | H11 (7.88); NH(10.78) |
| 10 | — | 134.4 | H11 (7.88); H12(7.51) |
| 11 | 7.88 (d, J = 6.8 Hz, 2H, H11) | 128.4 | H12 (7.51); H13 (7.68) |
| 12 | 7.51 (t, J = 6.8 Hz, 2H, H12) | 128.7 | H11 (7.88); H13 (7.68) |
| 13 | 7.68 (t, J = 6.8 Hz, 1H, H13) | 132.0 | H11 (7.65); H12 (7.51) |
| CH3 | 2.32 (s, 3H, CH3) | 16.8 | — |
| NH | 10.78 (s, 1H,NH) | — | — |