Sikokianin B

Sikokianin B

Common Name: Sikokianin B

Synonyms: [3,​3'-​Bi-​4H-​1-​benzopyran]​-​4,​4'-​dione, 2,​2',​3,​3'-​tetrahydro-​5,​5',​7,​7'-​tetrahydroxy-​2-​(4-​ hydroxyphenyl)​-​2'-​(4-​methoxyphenyl)​-​, (2R,​2'S,​3S,​3'S)​-

CAS Registry Number: 106235-33-0

InChI:

InChIKey:

Formula: C31H24O10

Molecular Weight: 556.52

Exact Mass: 556.137

NMR Solvent: CD3OD

MHz: 400 (1H), 100 (13C)

Calibration: not indicated

NMR references: Nunome, S., Ishiyama, A., Kobayashi, M., Otoguro, K., Kiyohara, H., Yamada, H., Omura, S. (2004). In Vitro Antimalarial Activity of Biflavonoids from Wikstroemia indica. Planta Medica 70, 76-78.

Niwa, M., Jiang, P., Hirata, Y. (1986). Two New C-3/C-3"-Biflavanones from Wikstroemia sikokiana. Chem. Pharm. Bull. 34, 3631-3634.

Species: Wikstroemia indica - Nunome, S., Ishiyama, A., Kobayashi, M., Otoguro, K., Kiyohara, H., Yamada, H., Omura, S. (2004). In Vitro Antimalarial Activity of Biflavonoids from Wikstroemia indica. Planta Medica 70, 76-78.

Notes:

Proton NMR Peaks

Position PPM Peak Type J (Hz)
2 5.17 d 9
3 3.33 dd 9, 3.5
6 5.87 d 2
8 5.97 d 2
2' 7.02 d 9
3' 6.74 d 9
5' 6.74 d 9
6' 7.02 d 9
OCH3 3.76 s
2" 5.52 d 3.5
3" 3.23 dd 3.5, 3.5
6" 5.76 d 2
8" 5.85 d 2
2''' 7.16 d 9
3''' 6.78 d 9
5''' 6.78 d 9
6''' 7.16 d 9

Carbon NMR Peaks

Position PPM
2 81.4
3 49.5
4 196
5 165.1
6 97.1
7 168.2
8 96
9 163.3
10 105
1' 130.1
2' 128.5
3' 116.3
4' 161.3
5' 116.3
6' 128.5
OCH3 55.7
2" 82.9
3" 50.8
4" 198.5
5" 165.4
6" 97.1
7" 168.3
8" 96.4
9" 165.1
10" 103.8
1''' 128.6
2''' 130.2
3''' 114.7
4''' 158.6
5''' 114.7
6''' 130.2