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Kaempferol (9)

SJ Shabnam Javed
ZM Zaid Mahmood
KK Khalid Mohammed Khan
SS Satyajit D. Sarker
AJ Arshad Javaid
IK Iqra Haider Khan
AS Amna Shoaib
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Melting point at 276–278 °C was recorded. UV spectrum recorded λmax at 265, 212 and 336 (4.0) nm while IR spectrum showed absorption at 3412, 2926, 1660, 1610, 1600–1525 and 1380 cm−1. 1H-NMR (400 MHz, DMSO), δ ppm: 8.03 (2H, d, J = 8.8 Hz, H-2′, -6′), 6.92 (2H, d, J = 8.8 Hz, H-3′,-5′), 6.42 (1H, d, J = 1.8 Hz, H-8), 6.18 (1H, d, J = 1.8 Hz, H-6).13C- NMR (150 MHz, CD3OD) δ ppm: 178.1 (C-4), 161.4 (C-5), 160.2 (C-7), 159.4 (C-4′), 155.9 (C-9), 146.2 (C-2), 137.2 (C-3), 128.3 (C-2′, -6′), 121.3 (C-1′), 114.2 (C-3′, -5′), 103.4 (C-10), 99.8 (C-6), 93.4 (C-8). EI-MS m/z [M]+ at : 286.

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