| 1,2,8-Trihydroxy-5-methoxy-3-methylxanthone (DMSO-d6) | ||
|---|---|---|
| Position | δC | δH (J in Hz) |
| 1 | 145.8 | - |
| 2 | 138.4 | - |
| –OH 2 | - | |
| 3 | 137.0 | - |
| 3–CH3 | 17.1 | 2.30 (s) (3H) |
| 4 | 107.6 | 6.95 (br s) (1H) |
| 4a | 147.7 | - |
| 5 | 139.7 | - |
| 5–OCH3 | 56.7 | 3.88 (s) (3H) |
| 6 | 120.5 | 7.45 (d, 9.0) (1H) |
| 7 | 108.2 | 6.70 (d, 9.0) (1H) |
| 8 | 152.6 | - |
| 8a | 107.6 | - |
| 9 | 185.1 | - |
| 9a | 105.9 | - |
| 10a | 145.0 | - |
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