Table 1.
1H- (400 MHz) and 13C-NMR (100 MHz) data of compound 1 (in CD3OD, δ in ppm, J in Hz) a.
| No. | δH | δC | No. | δH | δC | |
|---|---|---|---|---|---|---|
| 1 | 135.7 | 1' | 133.5 | |||
| 2 | 6.76 (1H, overlapped) | 116.1 | 2' | 6.78 (1H, d, J = 2.0 Hz) | 113.3 | |
| 3 | 149.0 | 3' | 145.7 | |||
| 4 | 6.90 (1H, d, J = 3.2 Hz) | 110.6 | 4' | 147.0 | ||
| 5 | 149.0 | 5' | 6.70 (1H, d, J = 8.0 Hz) | 119.8 | ||
| 6 | 6.75 (1H, overlapped) | 115.9 | 6' | 6.63 (1H, dd, J = 8.0, 2.0 Hz) | 122.1 | |
| 7 | 4.74 (1H, d, J = 6.8) | 84.0 | 7' | 2.92 (1H, dd, J = 13.2, 4.8 Hz, H-7'a)2.48 (1H, dd, J = 13.2, 11.6 Hz, H-7'b) | 33.6 | |
| 8 | 2.34 (1H, m) | 54.0 | 8' | 2.72 (1H, m) | 43.8 | |
| 9 | 3.97 (1H, dd, J = 8.4, 6.8, H-9a)3.71 (1H, dd, J = 8.4, 6.8, H-9b) | 60.4 | 9' | 3.82 (1H, overlapped, H-9'a)3.62 (1H, dd, 10.8, 6.4 Hz, H-9'b) | 73.4 | |
| 3-OCH3 | 3.83 (3H, s) | 56.3 | ||||
| 5-OCH3 | 3.82 (3H, s) | 56.3 |
a Assignments were confirmed by DEPT, 1H−1H COSY, HSQC, and HMBC.