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| 1,8-Dihydroxy-5-methoxy-3-methylxanthone (CDCl3) | ||
|---|---|---|
| Position | δC | δH (J in Hz) |
| 1 | 161.0 | - |
| 1–OH | - | 11.73 (s) (1H) a |
| 2 | 111.7 | 6.62 (br s) (1H) |
| 3 | 149.9 | - |
| 3–CH3 | 22.6 | 2.42 (s) (3H) |
| 4 | 108.0 | 6.84 (br s) (1H) |
| 4a | 156.0 | - |
| 5 | 140.0 | - |
| 5–OCH3 | 57.4 | 3.94 (s) (3H) |
| 6 | 120.8 | 7.23 (d, 9.0) (1H) |
| 7 | 109.1 | 6.70 (d, 9.0) (1H) |
| 8 | 154.2 | - |
| 8–OH | - | 11.33 (br s) (1H) a |
| 8a | 108.3 | - |
| 9 | 185.6 | - |
| 9a | 105.9 | - |
| 10a | 145.6 | - |
a Signals appearing in DMSO-d6 only.
