Spektraris NMR
Lanceolatin B pentaacetate
Common Name: Lanceolatin B pentaacetate
Synonyms: 4H-1-Benzopyran-4-one, 5,7-bis(acetyloxy)-3-[2-(acetyloxy)-5-[5-(acetyloxy)-7-methoxy-4-oxo-4H-1-benzopyran-2-yl]phenyl]-2-[4-(acetyloxy)phenyl]-2,3-dihydro-, (2R-trans)- (9CI)
CAS Registry Number: 158963-84-9
InChI:
InChIKey:
Formula: C41H32O15
Molecular Weight: 764.692
Exact Mass: 764.1741
NMR Solvent: acetone-d6
MHz: 300 (1H)
Calibration: TMS
NMR references: Pegnyemb, D., Ghogomu-Tih, R., Sondengam, B., Martin, M., Bodo, B. (1994). Minor Biflavonoids of Lophira lanceolata. J. Nat. Prod. 57, 1275-1278.
Species: synthesis - Pegnyemb, D., Ghogomu-Tih, R., Sondengam, B., Martin, M., Bodo, B. (1994). Minor Biflavonoids of Lophira lanceolata. J. Nat. Prod. 57, 1275-1278.
Notes:
Proton NMR Peaks
| Position | PPM | Peak Type | J (Hz) |
|---|---|---|---|
| 3 | 6.53 | s | |
| 6 | 6.79 | d | 2.6 |
| 7 | 3.9 | s | |
| 8 | 6.8 | d | 2.6 |
| 2' | 6.59 | d | 2.4 |
| 5' | 7.16 | d | 8.6 |
| 6' | 7.71 | dd | 8.6, 2.4 |
| 2" | 6.05 | d | 12.6 |
| 3" | 6 | d | 12.6 |
| 6" | 6.46 | d | 2.3 |
| 8" | 6.56 | d | 2.3 |
| 2''', 6''' | 7.5 | m | |
| 3''', 5''' | 7.05 | m | |
| OCH3 | 3.81 | s | |
| OAc | 2.39 | s | |
| OAc | 2.38 | s | |
| OAc | 2.27 | s | |
| OAc | 2.22 | s | |
| OAc | 2.2 | s |
