(2R,3S)-4',5,7-tri-O-methylnaringenin-(3α→5)-(2S)-2,4,4',6-tetra-O-methylmaesopsin

(2R,3S)-4',5,7-tri-O-methylnaringenin-(3α→5)-(2S)-2,4,4',6-tetra-O-methylmaesopsin

Common Name: (2R,3S)-4',5,7-tri-O-methylnaringenin-(3α→5)-(2S)-2,4,4',6-tetra-O-methylmaesopsin

Synonyms: 4H-​1-​Benzopyran-​4-​one, 3-​[(2S)​-​2,​3-​dihydro-​ 2,​4,​6-​trimethoxy-​2-​[(4-​methoxyphenyl)​methyl]​-​3-​oxo-​5-​ benzofuranyl]​-​2,​3-​dihydro-​5,​7-​dimethoxy-​2-​(4-​methoxyphenyl)​-​ , (2R,​3S)​-

CAS Registry Number: 247589-29-3

InChI:

InChIKey:

Formula: C37H36O11

Molecular Weight: 656.68

Exact Mass: 656.2258

NMR Solvent: CDCl3

MHz: not indicated

Calibration: TMS

NMR references: Bekker, R., Brandt, E., Ferreira, D. (1999). Biflavonoids. Part 4. Structure and Stereochemistry of Novel Flavanone- and the First Isoflavanone-benzofuranone Biflavonoids. Tetrahedron 55, 10005-10012.

Species: synthesis - Bekker, R., Brandt, E., Ferreira, D. (1999). Biflavonoids. Part 4. Structure and Stereochemistry of Novel Flavanone- and the First Isoflavanone-benzofuranone Biflavonoids. Tetrahedron 55, 10005-10012.

Notes: 1H NMR spectra recorded on a Bruker AM-300 spectrometer. Only 1H NMR performed by Bekker et al. Labeling of atoms differs here than in Bekker et al.

Proton NMR Peaks

Position PPM Peak Type J (Hz)
2 5.65 d 12
3 4.56 d 12
6 (may be interchanged with 8) 6.15 d 2
8 (may be interchanged with 6) 6.18 d 2
2', 6' 7.15 d 9
3', 5' (may be interchanged with 3''', 5''') 6.76 d 9
2"-OCH3 3.21 s
7" 6.08 s
10" 3.15 d 14, 14
10" 3.04 d
2''', 6''' 7.11 d 9
3''', 5''' (may be interchanged with 3', 5') 6.74 d 9
OCH3 3.89 s
OCH3 3.84 s
OCH3 3.8 s
OCH3 3.79 s
OCH3 3.75 s
OCH3 3.69 s