Ouratine B

Ouratine B

Common Name: Ouratine B

Synonyms: 4'-O-Methylagathisflavone

CAS Registry Number: 920745-74-0

InChI:

InChIKey:

Formula: C31H20O10

Molecular Weight: 552.491

Exact Mass: 552.1057

NMR Solvent: acetone-d6

MHz: 400 (1H), 100 (13C)

Calibration: TMS

NMR references: Mbing, J., Enguehard-Gueiffier, C., de Theodore Atchade, A., Allouchi, H., Gangoue-Pieboji, J., Mbafor, J., Tih, R., Pothier, J., Pegnyemb, D., Gueiffier, A. (2006). Two biflavonoids from Ouratea nigroviolacea. Phytochemistry 67, 2666-2670.

Species: Ouratea nigroviolacea - Mbing, J., Enguehard-Gueiffier, C., de Theodore Atchade, A., Allouchi, H., Gangoue-Pieboji, J., Mbafor, J., Tih, R., Pothier, J., Pegnyemb, D., Gueiffier, A. (2006). Two biflavonoids from Ouratea nigroviolacea. Phytochemistry 67, 2666-2670.

Notes:

Proton NMR Peaks

Position PPM Peak Type J (Hz)
3 6.77 s
5-OH 13.52 s
8 6.8 s
2' 8.11 d 8
3' 7.19 d 8
4'-OCH3 3.97 s
5' 7.19 d 8
6' 8.11 d 8
3'' 6.67 s
5-OH 13.19 s
6'' 6.42 s
2''' 7.7 d 8.1
3''' 6.88 d 8.1
5''' 6.88 d 8.1
6''' 7.7 d 8.1

Carbon NMR Peaks

Position PPM
2 165
3 105.6
4 183.5
5 161.8
6 104.6
7 162.9
8 95
9 158.6
10 104.6
1' 123.6
2' 129.1
3' 124.5
4' 164.2
4'-OCH3 56.1
5' 124.5
6' 129.1
2'' 164.7
3'' 105.2
4'' 183.2
5'' 161.7
6'' 103.9
7'' 162.9
8'' 100.1
9'' 156.6
10'' 103.9
1''' 123.6
2''' 128.9
3''' 116.8
4''' 161.8
5''' 116.8
6''' 128.9