Ephedrannin B

Ephedrannin B

Common Name: Ephedrannin B

Synonyms: Ephedrannin K; 5,7,4′-trihydroxyflavan (2α→O→7, 4α→8) kaempferol

CAS Registry Number: 1173698-15-1

InChI:

InChIKey:

Formula: C30H20O10

Molecular Weight: 540.48

Exact Mass: 540.1057

NMR Solvent: acetone-d6

MHz: 500 (1H), 125 (13C)

Calibration: not indicated

NMR references: Xu, M., Shen, L., Wang, K. (2009). A new biflavonoid from Daphniphyllum angustifolium Hutch. Fitoterapia 80, 461-464.

Species: Daphniphyllum angustifolium - Xu, M., Shen, L., Wang, K. (2009). A new biflavonoid from Daphniphyllum angustifolium Hutch. Fitoterapia 80, 461-464.

Notes:

Proton NMR Peaks

Position PPM Peak Type J (Hz)
3 2.4 dd 10.5
4 5.12 s
6 6.07 s
8 6.07 s
2' 7.58 d 8.5
3' 6.94 d 8.5
5' 6.95 d 8.5
6' 7.6 d 8.5
6" 6.38 s
2''' 8.53 d 8.5
3''' 7.02 d 8.5
5''' 7.03 d 8.5
6''' 8.54 d 8.5

Carbon NMR Peaks

Position PPM
2 100.1
3 34.4
4 21.4
5 152.6
6 97.1
7 154.5
8 96
9 158.3
10 105.4
1' 133.2
2' 127.9
3' 115.8
4' 160
5' 115.8
6' 127.9
2" 147.6
3" 136.8
4" 176.7
5" 159.9
6" 99.4
7" 158.3
8" 108.1
9" 156.1
10" 105.1
1''' 123.6
2''' 131.2
3''' 116.1
4''' 160.2
5''' 116.1
6''' 131.2