7-O-methyl-2,3-dihydroamentoflavone

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