Spektraris NMR
Ridiculuflavone B
Common Name: Ridiculuflavone B
Synonyms: [3,6'-Bi-4H-1-benzopyran]-4,4'-dione, 2'-(3,4-dihydroxyphenyl)-5',7,7'-trihydroxy-2-(4- hydroxyphenyl)-5-methoxy-, (+)-
CAS Registry Number: 851615-57-1
InChI:
InChIKey:
Formula: C31H20O11
Molecular Weight: 568.49
Exact Mass: 568.1006
NMR Solvent: DMSO-d6
MHz: 500 (1H), 126 (13C)
Calibration: Solvents used as internal standard.
NMR references: Machado, M., Lopes, L. (2005). Chalcone-flavone tetramer and biflavones from Aristolochia ridicula. Phytochemistry 66, 669-674.
Species: Aristolochia ridicula - Machado, M., Lopes, L. (2005). Chalcone-flavone tetramer and biflavones from Aristolochia ridicula. Phytochemistry 66, 669-674.
Notes:
Proton NMR Peaks
| Position | PPM | Peak Type | J (Hz) |
|---|---|---|---|
| 6 | 6.4 | d | 2.5 |
| 8 | 6.47 | d | 2.5 |
| 2' | 7.35 | d | 9 |
| 3' | 6.7 | d | 9 |
| 5' | 6.7 | d | 9 |
| 6' | 7.35 | d | 9 |
| 3" | 6.66 | s | |
| 8" | 6.5 | s | |
| 2''' | 7.41 | d | 2.8 |
| 5''' | 6.91 | d | 8.5 |
| 6''' | 7.43 | dd | 8.5, 2.8 |
| 5-OCH3 | 3.79 | s | |
| 4'-OH | 8.71 | brs | |
| 5"-OH | 13.05 | s |
Carbon NMR Peaks
| Position | PPM |
|---|---|
| 2 (may be interchanged with 4') | 159 |
| 4 | 174 |
| 5 | 160.8 |
| 6 | 96.5 |
| 7 | 161.5 |
| 8 | 94.9 |
| 9 | 162.4 |
| 10 | 106.5 |
| 1' | 123.7 |
| 2' | 129.3 |
| 3' | 115 |
| 4' (may be interchanged with 2) | 159.1 |
| 5' | 115 |
| 6' | 129.3 |
| 2" | 163.8 |
| 3" | 102.9 |
| 4" | 181.7 |
| 5" | 159.5 |
| 6" | 106.1 |
| 7" (may be interchanged with 9") | 159.3 |
| 8" | 93.3 |
| 9" (may be interchanged with 7") | 156.5 |
| 10" | 103.4 |
| 1''' | 121.6 |
| 2''' | 113.4 |
| 3''' | 145.8 |
| 4''' | 149.7 |
| 5''' | 116.1 |
| 6''' | 119 |
| 5-OCH3 | 55.9 |
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