(2S,3S,8S,8aR,14aS)-6a-hydroxy-3,8a,10,12-tetramethoxy-2,8-bis(4-methoxyphenyl)-3,4,8,8a-tetrahydro-2H,6aH,9H-furo[3,4-b:2,3-h']dichromen-9-one

(2S,3S,8S,8aR,14aS)-6a-hydroxy-3,8a,10,12-tetramethoxy-2,8-bis(4-methoxyphenyl)-3,4,8,8a-tetrahydro-2H,6aH,9H-furo[3,4-b:2,3-h']dichromen-9-one

Common Name: (2S,3S,8S,8aR,14aS)-6a-hydroxy-3,8a,10,12-tetramethoxy-2,8-bis(4-methoxyphenyl)-3,4,8,8a-tetrahydro-2H,6aH,9H-furo[3,4-b:2,3-h']dichromen-9-one

Synonyms:

CAS Registry Number: 142674-73-5

InChI:

InChIKey:

Formula: C36H36O11

Molecular Weight: 644.67

Exact Mass: 644.2258

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:

Proton NMR Peaks

Position PPM Peak Type J (Hz)
2 4.61 d 6.5
3 3.47 m
4 2.41 dd 17, 5
4 2.21 dd 17, 6.7
5 5.99 d 9.9
6 5.74 d 9.9
2', 6' 7.06 d 8.8
3', 5' 6.74 d 8.8
2" 5.32 s
6" 6.04 d 2.3
8" 6.24 d 2.3
2''', 6''' 7.19 d 8.8
3''', 5''' 6.81 d 8.8
OH 4.6 s
OCH3 3.86 s
OCH3 3.78 s
OCH3 3.78 s
OCH3 3.77 s
OCH3 3.34 s
OCH3 3.13 s

Carbon NMR Peaks

Position PPM
2 78.79
3 76.73
4 29.11
10 106.41
5 123.14
6 124.75
7 104.97
8 90.2
9 145.33
1' 130.74
2', 6' 127.79
3', 5' 113.7
4' (may be reversed with 4''') 159.65
2" 83.54
3" 91.4
4" 184.37
10'' 105.32
5" 163.22
6" 93.72
7" 166.86
8" 94.17
9'' 163.3
1''' 126.22
2''', 6''' 130.17
3''', 5''' 113.47
4''' (may be reversed with 4') 160.09
3-OCH3 57.49
OCH3 56.7
OCH3 56.48
OCH3 55.99
OCH3 55.52
OCH3 55.4