Wikstaiwanone B

Wikstaiwanone B

Common Name: Wikstaiwanone B

Synonyms: [3,​6'-​Bi-​4H-​1-​benzopyran]​-​4-​one, 2',​3'-​dihydro-​3',​5,​5',​7,​7'-​pentahydroxy-​2,​2'-​bis(4-​hydroxyphenyl)​-​, (2'S,​3'R)​-

CAS Registry Number: 1417071-30-7

InChI:

InChIKey:

Formula: C30H22O10

Molecular Weight: 542.496

Exact Mass: 542.1213

NMR Solvent: acetone-d6

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

Calibration: not indicated

NMR references: Chen, L., Chen, I., Peng, C. (2012). Structural Elucidation and Bioactivity of Biflavonoids from the Stems of Wikstroemia taiwanensis. Int. J. Mol. Sci. 13, 1029-1038.

Species: Wikstroemia taiwanensis - Chen, L., Chen, I., Peng, C. (2012). Structural Elucidation and Bioactivity of Biflavonoids from the Stems of Wikstroemia taiwanensis. Int. J. Mol. Sci. 13, 1029-1038.

Notes:

Proton NMR Peaks

Position PPM Peak Type J (Hz)
6 6.18 d 1.2
8 6.38 d 1.2
2' 7.57 d 8.8
3' 6.87 d 8.8
5' 6.87 d 8.8
6' 7.57 d 8.8
2" 4.53 d 8.2
3" 3.68 br d 8.2
4"a 2.91 dd 16, 5.6
4"b 2.56 dd 16, 6.8
8" 6.15 s
2''' 6.87 d 8.8
3''' 6.65 d 8.8
5''' 6.65 d 8.8
6''' 6.87 d 8.8

Carbon NMR Peaks

Position PPM
2 164.5
3 114.4
4 183.4
5 164.2
6 99.9
7 165.3
8 94.7
9 159.3
10 105.7
1' 126.4
2' 131.9
3' 116.4
4' 161.1
5' 116.4
6' 131.9
2" 83.5
3" 69.2
4"a 30.3
5" 155
6" 101
7" 156.7
8" 97
9" 157.7
10" 101.6
1''' 131.9
2''' 130.1
3''' 116.2
4''' 158.5
5''' 116.2
6''' 130.1