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. 2020 Mar 8;2020:3903682. doi: 10.1155/2020/3903682

Table 3.

13C-NMR and 1H-NMR data of quercetin.

No. 13C-NMR (PPM) 1H-NMR (PPM)
1
2 147.4
3 136.2 (1H, s)
4 176.4
5 161.2 (1H, s)
6 98.7 6.07 (1H, d), J = l.8 Hz
7 164.4 7.7 (1H, s)
8 93.8 6.28 (1H, d), J = 1.8 Hz
9 157.6
10 98.7
1′ 122.5
2′ 115.6 7.62 (1H, d), J = 8.51 Hz
3′ 145.5
4′ 148.2
5′ 116.1 6.78 (lH, d), J = 8.4 Hz
6′ 115.7 7.53 (1H, d), J = 8.40 Hz

J is the coupling constant and is measured in Hz.