Table 2.
1H-NMR chemical shifts (δ) and coupling constants (Hz) of metabolites identified in EECCL
| Metabolite | 1H-NMR signals |
|---|---|
| Quercetin | δ 6.25 (d, J = 1.5 Hz) |
| δ 6.42 (d, J = 1.5 Hz) | |
| δ 6.80 (d, J = 1.5 Hz) | |
| δ 6.83 (d, J = 8.5 Hz) | |
| δ 6.98 (d, J = 8.5 Hz) | |
| δ 7.75 (d, J = 2.0 Hz) | |
| δ 7.79 (d, J = 2.0 Hz) | |
| δ 7.45 (dd, J = 8.5 Hz, 2.0 Hz) | |
| Quercetin 3-O-α-rhamnoside | δ 6.25 (d, J = 1.5 Hz) |
| δ 6.42 (d, J = 1.5 Hz) | |
| δ 6.80 (d, J = 1.5 Hz) | |
| δ 6.83 (d, J = 8.5 Hz) | |
| δ 7.29 (dd, J = 8.0 Hz, 2.0 Hz) | |
| δ 7.75 (d, J = 2.0 Hz) | |
| Anomeric proton rhamnosyl | |
| δ 4.54 (d, J = 2.0 Hz) | |
| Methyl signal; | |
| δ 0.92 (d, J = 6.0 Hz) | |
| Quercetin 3-O-β-glucoside | δ 6.25 (d, J = 1.5 Hz) |
| δ 6.42 (d, J = 1.5 Hz) | |
| δ 6.80 (d, J = 1.5 Hz) | |
| δ 6.83 (d, J = 8.5 Hz) | |
| δ 7.75 (d, J = 2.0 Hz) | |
| δ 5.08 (d, J = 7.5 Hz) | |
| Anomeric proton glucosyl | |
| δ 4.97 (d, J = 7.5 Hz) | |
| Rutin | δ 6.25 (d, J = 1.5 Hz) |
| δ 6.95 (d, J = 8.5 Hz) | |
| δ 7.54 (dd, J = 8.5 Hz, 2.5 Hz) | |
| Anomeric proton rhamnosyl | |
| δ 4.54 (d, J = 2.0 Hz) | |
| Anomeric proton glucosyl | |
| δ 4.97 (d, J = 7.5 Hz) | |
| Chlorogenic acid | δ 2.07 (m) |
| δ 2.22 (m) | |
| δ 7.06 (dd, J = 8.5, 1.5 Hz) | |
| δ 7.14 (d, J = 1.5 Hz) | |
| Signal for caffeoyl | |
| δ 6.36 (d, J = 16.0 Hz) | |
| δ 7.62 (d, J = 16.0 Hz) | |
| Signal for quinic | |
| δ 1.91 (d, J = 10.0 Hz) | |
| Catechin | δ 2.56 (dd, J = 7.5 Hz, 16.0 Hz) |
| δ 2.85 (m) | |
| δ 3.91 (m) | |
| δ 6.44 (d, J = 2.0 Hz) | |
| Epicatechin | δ 6.44 (d, J = 2.0 Hz) |
| δ 7.00 (d, J = 8.0 Hz) | |
| δ 7.29 (dd, J = 8.0 Hz, 2.0 Hz) | |
| δ 4.97 (d, J = 7.5 Hz) | |
| Kaempferol | δ 6.26 (d, J = 2.0 Hz) |
| δ 6.44 (d, J = 2.0 Hz) | |
| δ 6.80 (d, J = 1.5 Hz) | |
| δ 7.00 (d, J = 8.0 Hz) | |
| δ 8.01 (d, J = 8.5 Hz) | |
| Sucrose | δ 4.19 (d, J = 8.5 Hz) |
| δ 5.42 (d, J = 3.5 Hz) | |
| β glucose | δ 4.60 (d, J = 8.0 Hz) |
| α glucose | δ 5.20 (d, J = 3.5 Hz) |
| Alanine | δ 1.50 (d, J = 7.5 Hz) |
| Valine | δ 1.02 (d, J = 7.0 Hz) |
| δ 1.11 (d, J = 6.5 Hz) | |
| δ 2.22 (m) | |
| Fatty acid | δ 1.35 (m) |
| Choline | δ 3.20 (s) |
| Isocitric acid | δ 4.12 (d, J = 5.0 Hz) |