Spektraris NMR
Genkwanol B
Common Name: Genkwanol B
Synonyms:
CAS Registry Number: 142674-67-7
InChI:
InChIKey:
Formula: C30H22O11
Molecular Weight: 558.495
Exact Mass: 558.1162
NMR Solvent: DMSO-d6
MHz: 300 (1H), 75.4 (13C)
Calibration: TMS
NMR references: Baba, K., Taniguchi, M., Kozawa, M. (1992) A Spirobiflavonoid Genkwanol B from Daphne Genkwa. Phytochemistry 31, 975-980.
Baba, K., Taniguchi, M., Ohishi, H., Kozawa, M. (1993). Stereochemistry of the Spirobiflavonoid Genkwanol B From Daphne genkwa. Phytochemistry 32, 221-223.
Baba, K., Taniguchi, M., Kozawa, M. (1993). A Third Spirobiflavonoid Genkwanol C From Daphne genkwa. Phytochemistry 33, 913-916.
Species: Daphne Genkwa - Baba, K., Taniguchi, M., Kozawa, M. (1992) A Spirobiflavonoid Genkwanol B from Daphne Genkwa. Phytochemistry 31, 975-980.
Notes:
Proton NMR Peaks
| Position | PPM | Peak Type | J (Hz) |
|---|---|---|---|
| 2 | 4.56 | d | 8.4 |
| 3 | 3.55 | m | |
| 4 | 2.59 | dd | 16.9, 4.8 |
| 4 | 2.05 | dd | 16.9, 8.9 |
| 6 | 5.71 | s | |
| 2', 6' | 6.59 | d | 8.8 |
| 3', 5' | 6.51 | d | 8.8 |
| 2" | 5.97 | s | |
| 6" | 6.04 | d | 2.2 |
| 8" | 6.12 | d | 2.2 |
| 2''', 6''' | 7.09 | d | 8.8 |
| 3''', 5''' | 6.73 | d | 8.8 |
| OH | 11.23 | s | |
| OH | 11.23 | s | |
| OH | 9.58 | s | |
| OH | 9.34 | s | |
| OH | 6.57 | s | |
| OH | 5.15 | d | 6.2 |
Carbon NMR Peaks
| Position | PPM |
|---|---|
| 2 | 82.28 |
| 3 | 66.63 |
| 4 | 27.01 |
| 5 | 186.87 |
| 6 | 100.76 |
| 7 | 169.1 |
| 8 | 85.3 |
| 9 (may be reversed with 4', 4''') | 157.22 |
| 10 | 109.57 |
| 1' | 128.34 |
| 2', 6' | 127.73 |
| 3', 5' | 114.77 |
| 4' (may be reversed with 9, 4''') | 158.46 |
| 2" | 90.21 |
| 3" | 80.04 |
| 4" | 191.07 |
| 5" | 163.82 |
| 6" | 97.33 |
| 7" | 168.12 |
| 8" | 96.46 |
| 9" | 160.64 |
| 10" | 100.15 |
| 1''' | 122.39 |
| 2''', 6''' | 130.24 |
| 3''', 5''' | 114.95 |
| 4''' (may be reversed with 9, 4') | 158.6 |
