Vitexin (data page)

This page provides supplementary chemical data on vitexin.

Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as MSDS Search Engine, and follow its directions.

Spectral data

UV-Vis
Lambda-max UV : 335, 271 nm
Extinction coefficient log ε: 4.08, 4.15
IR
Major absorption bands ? cm−1
NMR
Proton NMR 1H-NMR (500 MHz, CD3COCD3 + D2O):

δ 3.53 (1H, m, H-5′′), 3.54 (1H, m, H-3″),
3.57 (1H, m, H-4″), 3.74 (1H, dd, J = 12.3, 5.5 Hz, H-6a″),
3.77 (1H, dd, J = 12.3, 2.0 Hz, H-6b″), 4.11
(1H, t, J = 9.0 Hz, H-2″), 4.85 (1H, d, J = 9.9 Hz, H-1″)
6.44 (1H, s, H-8), 6.60 (1H, s, H-3), 6.95
(2H, d, J = 8.6 Hz, H-3′, 5′), 7.85
(2H, d, J = 8.6 Hz, H-2′, 6′)

Carbon-13 NMR 13C-NMR (125 MHz, CD3COCD3 + D2O):

δ 61.7 (C-6″), 70.6 (C-4″), 72.0 (C-2″), 74.5
(C-1″), 79.2 (C-3″), 81.6 (C-5″), 95.3 (C-8),
103.4 (C-3), 104.3 (C-10), 108.7 (C-6), 116.7
(C-3′, 5′), 122.4 (C-1′), 129.0 (C-2′, 6′),
157.7 (C-9), 161.0 (C-5), 162.0(C- 4′),
164.5 (C-7), 165.0 (C-2), 183.1 (C-4)

Other NMR data
MS
Masses of
main fragments		 ESI-MS [M+H]+ m/z 433.1

Reference: Yi-Pei Lin, Tai-Yuan Chen, Hsiang-Wen Tseng, Mei-Hsien Lee and Shui-Tein Chen (2009). "Neural cell protective compounds isolated from Phoenix hanceana var. formosana". Phytochemistry. 70 (9): 1173–1181. doi:10.1016/j.phytochem.2009.06.006. PMID 19628235. 

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