Common Name: 3,3',5,7-tetramethoxy-2'-(4-methoxyphenyl)-3',4'-dihydro-2'H,7'H-spiro[chromane-2,8'-chromene]-4,7'-dione
Synonyms:
CAS Registry Number: 142705-61-1
InChI:
InChIKey:
Formula: C28H28O9
Molecular Weight: 508.52
Exact Mass: 508.1733
NMR Solvent: CDCl3
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.
Species: synthesis from Genkwanol B - Baba, K., Taniguchi, M., Kozawa, M. (1992) A Spirobiflavonoid Genkwanol B from Daphne Genkwa. Phytochemistry 31, 975-980.
Notes:
Position | PPM | Peak Type | J (Hz) |
---|---|---|---|
2 | 4.79 | d | 7.6 |
3 | 3.75 | m | |
4 | 2.52 | dd | 16.2, 5.4 |
4 | 2.4 | dd | 16.2, 7.7 |
5 | 6.89 | d | 9.8 |
6 | 5.95 | d | 9.8 |
2', 6' | 6.87 | d | 8.8 |
3', 5' | 6.68 | d | 8.8 |
3" | 4.57 | s | |
6" | 6 | d | 2.2 |
8" | 6.08 | d | 2.2 |
OCH3 | 3.81 | s | |
OCH3 | 3.76 | s | |
OCH3 | 3.7 | s | |
OCH3 | 3.57 | s | |
OCH3 | 3.15 | s |
Position | PPM |
---|---|
2 | 79.69 |
3 | 76.39 |
4 | 29.6 |
10 | 105.24 |
5 | 148.1 |
6 | 118.46 |
7 | 195.17 |
8 | 80.69 |
9 | 156.12 |
1' | 129.99 |
2', 6' | 127.96 |
3', 5' | 113.79 |
4' | 159.74 |
3" | 82.13 |
4" | 188.57 |
10'' | 105.54 |
5" | 161.82 |
6" | 93.54 |
7" | 166.08 |
8" | 93.71 |
9'' | 163.03 |
3"-OCH3 | 61.69 |
3-OCH3 | 57.74 |
OCH3 | 56.46 |
OCH3 | 55.89 |
OCH3 | 55.48 |