Table 1 The 1 H and 13 C NMR data of Dioscorealide B
Position | Dioscorealide B (in DMSO-d6) | ||
|---|---|---|---|
1H(mult, J in Hz)a | 13C | HMBC (c→H) | |
1 | 168.9 | ||
1a | 114.9 | H-3 | |
1b | 136.8 | H-2 | |
2 | 7.76 (d, 8.5) | 121.2 | |
3 | 7.88 (d, 8.5) | 128.2 | H-4 |
3a | 138.5 | H-2 | |
3b | 116.3 | H-3,H-4 | |
4 | 7.36 (d, 2.5) | 103.9 | |
5 | 162.2 | 5-OCH3 | |
6 | 6.88 (d, 2.5) | 110.7 | H-4 |
6a | 152.1 | ||
8 | 6.03 (s) | 94.1 | |
9 | 141.9 | 9-OCH3 | |
9a | 130.7 | ||
5-OCH3 | 3.96 (3H, S) | 56.7 | |
8-OCH3 | |||
9-OCH3 | 4.13 (3H,s) | 60.0 | |