Lanceolatin A

Lanceolatin A

Common Name: Lanceolatin A

Synonyms: 4H-1-Benzopyran-4-one, 3-[5-(5,7-dihydroxy-4-oxo-4H-1-benzopyran-2-yl)-2-hydroxyphenyl]-2,3-dihydro-5,7-dihydroxy-2-(4-hydroxyphenyl)-, (2R-trans)-

CAS Registry Number: 159194-98-6

InChI:

InChIKey:

Formula: C30H20O10

Molecular Weight: 540.48

Exact Mass: 540.1057

NMR Solvent: acetone-d6

MHz: 300 (1H), 75 (13C)

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: Lophira lanceolata - 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
5-OH 12.96 s
6 6.22 d 1.9
8 6.47 d 1.9
2' 7.75 d 2.2
5' 6.95 d 9.1
6' 7.73 dd 9.1, 2.2
2" 5.93 d 12.1
3" 4.72 d 12.1
5"-OH 12.22 s
6" 5.99 d 2.2
8" 6 d 2.2
2''', 6''' 7.3 m
3''', 5''' 6.73 m

Carbon NMR Peaks

Position PPM
2 163.8
3 102.3
4 182.11
5 162.11
6 99.54
7 163.84
8 94.79
9 157.33
10 104.28
1' 122.29
2' 131.7
3' 123.85
4' 158.74
5' 115.82
6' 127.31
2" 83.25
3" 55.38
4" 196.24
5" 166.35
6" 94.81
7" 164.8
8" 95.96
9" 163.07
10" 101.73
1''' 128.06
2''', 6''' 129.92
3''', 5''' 114.81
4''' 157.31