2,2'-bis(4-hydroxyphenyl)-7,7'-dimethyl-3-((2R,3R,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)-3'-((2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahydro-2H-pyran-2-yl)-4H,4'H-[5,5'-bichromene]-4,4'-dione

2,2'-bis(4-hydroxyphenyl)-7,7'-dimethyl-3-((2R,3R,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)-3'-((2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahydro-2H-pyran-2-yl)-4H,4'H-[5,5'-bichromene]-4,4'-dione

Common Name: 2,2'-bis(4-hydroxyphenyl)-7,7'-dimethyl-3-((2R,3R,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)-3'-((2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahydro-2H-pyran-2-yl)-4H,4'H-[5,5'-bichromene]-4,4'-dione

Synonyms:

CAS Registry Number: 883907-63-9

InChI:

InChIKey:

Formula: C44H42O15

Molecular Weight: 810.805

Exact Mass: 810.2524

NMR Solvent: DMSO-d6

MHz: 300 (1H), 75 (13C)

Calibration: not indicated

NMR references: Yadav, S., Bhadoria, B. (2005). Two dimeric flavonoids from Bauhinia purpurea. Indian J. Chem. 44B, 2604-2607.

Species: Bauhinia purpurea - Yadav, S., Bhadoria, B. (2005). Two dimeric flavonoids from Bauhinia purpurea. Indian J. Chem. 44B, 2604-2607.

Notes: Sugar protons 3.00-3.80 ppm

Proton NMR Peaks

Position PPM Peak Type J (Hz)
6 6.5 d 1.7
8 5.9 d 1.7
7, CH3 1.53 s
2', 3' 6.8 d 8.4
4'-OH 9.4 s
5', 6' 7.9 d 8.4
sugar protons 3 m
sugar protons 3.8 m
anomeric 4.67 d 1.5
rhamnose CH3 0.83 s

Carbon NMR Peaks

Position PPM
2 156
3 108.3
4 182.1
5 128.3
6 98.2
7 105.4
8 94.6
9 161.4
10 107.6
1' 122.3
2' 124.3
3' 120.1
4' 162.3
5' 120.1
6' 124.3
CH3 17.3
1 73.1
2 70.2
3 70.9
4 71.4
5 68.4
CH3 17.8
1 75.7
2 78.5
3 75.4
4 76.5
5 76.8
6 61.1