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 eChemPortal, and follow its directions. Sigma Aldrich MSDS from SDSdata.org
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
References