Spektraris NMR
7-O-methyl-2,3-dihydroamentoflavone
Common Name: 7-O-methyl-2,3-dihydroamentoflavone
Synonyms: 4H-1-Benzopyran-4-one, 2-[3-[5,7-dihydroxy-2-(4-hydroxyphenyl)-4-oxo-4H-1-benzopyran-8-yl]-4-hydroxyphenyl]-2,3-dihydro-5-hydroxy-7-methoxy-, (S)- (9CI)
CAS Registry Number: 126794-76-1
InChI:
InChIKey:
Formula: C31H22O10
Molecular Weight: 554.51
Exact Mass: 554.1213
NMR Solvent: acetone-d6
MHz: not indicated
Calibration: Chemical shift for acetone used as reference.
NMR references: Markham, K., Franke, A., Molloy, B., Webby, R. (1990). Flavonoid Profiles of New Zealand Libocedrus And Related Genera. Phytochemistry 29, 501-507.
Species: various - Markham, K., Franke, A., Molloy, B., Webby, R. (1990). Flavonoid Profiles of New Zealand Libocedrus And Related Genera. Phytochemistry 29, 501-507.
Notes: Only 1H NMR data collected by Markham et al; 1H NMR data was also collected with DMSO-d6 as solvent.
Proton NMR Peaks
| Position | PPM | Peak Type | J (Hz) |
|---|---|---|---|
| 2 | 5.58 | dd | 2.6, 13.1 |
| 3 (signal for other proton at 3 was obscured) | 3.3 | m | |
| 6 | 6.03 | d | 2.5 |
| 8 | 6.03 | d | 2.5 |
| 2' | 7.56 | d | 1.9 |
| 5' | 7.17 | d | 8.2 |
| 6' | 7.52 | brd | 8.2 |
| 3" | 6.67 | s | |
| 6" | 6.42 | s | |
| 2''', 6''' | 7.68 | d | 8.4 |
| 3''', 5''' | 6.91 | d | 8.4 |
| 5-OH | 12.13 | s | |
| 5"-OH | 13.14 | s | |
| 7-OH | 9.5 | s | |
| 7"-OH | 9.5 | s | |
| OCH3 | 3.82 | s |
