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. 2007 Dec;3(4):269–278.

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© Kishore K. Chiruvella et al. Licensee Master Publishing Group

This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.5/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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¹³C NMR spectra of luteolin-7-O-glucoside (75 MHz, DMSO-46) data showing the presence of a ketone carbonyl (δ 181.8), two olefinic carbons (δ 164.3 and 103.0), four gydroxyl carbons (δ 162.8, 161.0, 149.8 and 145.7). The coupling constant (J = 7.3 Hz) of the anomeric proton located at δ 5.09 and the ¹³C NMR chemical shifts of the sugar carbons (δ 99.7, 77.0, 76.3, 73.0, 69.4 and 60.5) revealed the presence of β-O-glucoside unit.