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1H-NMR (DMSO/TMS) chemical shifts of isolated berberine in ppm [36].
| Proton | δ (ppm) |
|---|---|
| H 5 | 3.17 (2H, t) |
| H 10-OCH3 | 4.03 (3H, s) |
| H 9-OCH3 | 4.05 (3H, s) |
| H 6 | 4.89 (2H, t, J = 5.35 Hz) |
| H 2,3-OCH2O | 6.14 (2H, s) |
| H 4 | 7.06 (1H, s) |
| H 1 | 7.77 (1H, s) |
| H 12 | 7.96 (1H, d, J = 8.4 Hz) |
| H 11 | 8.17 (1H, d, J = 8.4 Hz) |
| H 13 | 8.90 (1H, s) |
| H 8 | 9.85 (1H, s) |
