Genkwanol A

Genkwanol A

Common Name: Genkwanol A

Synonyms: Spiro[benzofuran-2(3H),9'(8'H)-[2H]furo[2,3-h][1]benzopyran]-3-one, 3',4'-dihydro-3',4,5',6-tetrahydroxy-2',8'-bis(4-hydroxyphenyl)-, [2'R-(2'α,3'β,8'α,9'α)]-

CAS Registry Number: 111103-90-3

InChI:

InChIKey:

Formula: C30H22O10

Molecular Weight: 542.496

Exact Mass: 542.1213

NMR Solvent: acetone-d6

MHz: 300 (1H)

Calibration: TMS

NMR references: Taniguchi, M., Baba, K. (1996). Three Biflavonoids From Daphne odora. Phytochemistry 42, 1447-1453.

Baba, K., Taniguchi, M., Kozawa, M. (1993). A Third Spirobiflavonoid Genkwanol C From Daphne genkwa. Phytochemistry 33, 913-916.

Species: Daphne odora - Taniguchi, M., Baba, K. (1996). Three Biflavonoids From Daphne odora. Phytochemistry 42, 1447-1453.

Notes:

Proton NMR Peaks

Position PPM Peak Type J (Hz)
2 4.62 d 7.7
3 3.8 m
(OH or H) 4.2 d 4.9
4 2.89 dd 16.1, 5.7
4 2.54 dd 16.1, 8.4
6 6.17 s
2', 6' 6.89 d 8.8
3', 5' 6.6 d 8.8
2" 5.63 s
6" 5.79 d 2
8" 5.77 d 2
10", 14" 7.15 d 8.8
11", 13" 6.77 d 8.8
OH 9.55 s
OH 8.95 s
OH 8.6 s
OH 8.5 s
OH 8.25 s

Carbon NMR Peaks

Position PPM
2 82.1
3 68.5
4 28.9
10 102.9
5 (may be interchanged with 7) 163.1
6 91.1
7 (may be interchanged with 5) 160.7
8 104.1
9 153.2
1' 130.8
2', 6' 128.7
3', 5' 115.9
4' 158
2" 92.4
3" 96.2
4" 196.7
10'' 104.6
5" 158.6
6" 97.4
7" 170.1
8" 91.2
9'' 173.6
1''' 125.5
2''', 6''' 130.1
3''', 5''' 116.1
4''' 159.1