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Beilstein J. Org. Chem. 2018, 14, 3112–3121, doi:10.3762/bjoc.14.291
Graphical Abstract
Figure 1: Structures of quercetin pentamethyl ether (QPE, 1) and quercetin (2).
Figure 2: Selected HMBC correlations of 6-methyl-3,5,7,3',4'-penta-O-methylquercetin (5).
Figure 3: Three representative conformers of neutral quercetin (2). Top and side views are shown. The relativ...
Figure 4: Structures of oxyanions derived from quercetin (2) by deprotonation of a single OH group. Top and s...
Figure 5: Deprotonation energy of the OH group at 5 position in neutral 2A and tetra-O-methylated quercetin 4A...
Figure 6: Structures and energies of C-methylated products of the tetra- 4 and the penta-O-methyl quercetins 1...