Ridiculuflavone A

Ridiculuflavone A

Common Name: Ridiculuflavone A

Synonyms: [3,​6'-​Bi-​4H-​1-​benzopyran]​-​4,​4'-​dione, 2'-​(3,​4-​dihydroxyphenyl)​-​5,​5',​7,​7'-​tetrahydroxy-​2-​(4-​hydroxyphenyl)​-​, (+)​- (9CI)

CAS Registry Number: 851615-56-0

InChI:

InChIKey:

Formula: C30H18O11

Molecular Weight: 554.46

Exact Mass: 554.0849

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 6.25 d 2
8 6.47 d 2
2' 7.38 d 8.8
3' 6.72 d 8.8
5' 6.72 d 8.8
6' 7.38 d 8.8
3" 6.66 s
8" 6.59 s
2''' 7.42 d 2.2
5''' 6.91 d 8
6''' 7.41 dd 8, 2.2
4'-OH 8.8 brs
5-OH 13.16 s
5"-OH 12.92 s

Carbon NMR Peaks

Position PPM
2 (may be interchanged with 4') 161.6
3 112.1
4 182.2
5 159.8
6 98.8
7 164
8 93.6
9 156.7
10 102.8
1' 124
2' 129.6
3' 115.2
4' (may be interchanged with 2) 161.5
5' 115.2
6' 129.6
2" 164.4
3" 103
4" 181.6
5" 162.9
6" 106.2
7" (may be interchanged with 9") 159.5
8" 93.5
9" (may be interchanged with 7") 157.3
10" 104.1
1''' 121.4
2''' 113.4
3''' 145.8
4''' 149.8
5''' 116.1
6''' 119