Wikstrol A

Wikstrol A

Common Name: Wikstrol A

Synonyms: [3,​8'-​Bi-​4H-​1-​benzopyran]​-​4-​one, 2',​3'-​dihydro-​3',​5,​5',​7,​7'-​pentahydroxy-​2,​2'-​bis(4-​hydroxyphenyl)​-​, (2'R,​3S,​3'S)​-

CAS Registry Number: 159736-35-3

InChI:

InChIKey:

Formula: C30H22O10

Molecular Weight: 542.496

Exact Mass: 542.1213

NMR Solvent: DMSO-d6

MHz: 300 (1H), 75.4 (13C)

Calibration: TMS

NMR references: Baba, K., Taniguchi, M., Kozawa, M. (1994). Three Biflavonoids From Wikstroemia sikokiana. Phytochemistry 37, 879-883.

Species: Wikstroemia sikokiana - Baba, K., Taniguchi, M., Kozawa, M. (1994). Three Biflavonoids From Wikstroemia sikokiana. Phytochemistry 37, 879-883.

Notes: Atropisomer of Wikstrol B

Proton NMR Peaks

Position PPM Peak Type J (Hz)
2 4.38 d 6.7
3 3.8 m
(OH or H) 4.88 d 4.8
4 2.57 dd 16.2, 5.8
4 2.37 dd 16.2, 7.4
6 5.94 s
2', 6' 7.05 d 8.6
3', 5' 6.63 d 8.6
6" 6.17 d 2.1
8" 6.34 d 2.1
2''', 6''' 7.33 d 8.8
3''', 5''' 6.68 d 8.8
OH 13.31 s
OH 10.73 s
OH 9.96 s
OH 9.27 s
OH 9.24 s
OH 8.68 s

Carbon NMR Peaks

Position PPM
2 80.8
3 66.4
4 27.2
5 156.2
6 95.3
7 (may be interchanged with 9) 153.8
8 98.7
9 (may be interchanged with 7) 154.4
10 99.2
1' 130.4
2', 6' 128.3
3', 5' 114.8
4' 157
2" 162.5
3" 113.4
4" 182
10'' 103.5
5" 162.1
6" 98.7
7" 164.3
8" 93.5
9'' 157.6
1''' 124
2''', 6''' 130.4
3''', 5''' 115.1
4''' 159.7