Table 2.
1H NMR, 13C NMR characteristic signals and LC-MS/MS data of identified metabolites in C. caudatus extracts
| Metabolite | NMR Chemical shift (ppm) | Molecular ion (M-H)+ | MS/MS fragments | |
|---|---|---|---|---|
| δH, mult (J in Hz) | δC | |||
| Quercetin | 5.24, d (2) | |||
| 5.28, d (7.8) | ||||
| 6.24, d (2) | ||||
| 6.28, d (2) | ||||
| 6.44, d (2) | ||||
| 7.02, d (8.5) | ||||
| 7.36, d (2) | ||||
| 7.28, dd (8, 2) | ||||
| 7.56, dd (8, 2) | ||||
| Quercetin 3-O-arabinofuranoside | 6.28, d (2) | 435.0780 | 303.0469, 181.0580, 153.9813 | |
| 7.02, d (8.5) | ||||
| 7.36, d (2) | ||||
| 7.56, dd (8, 2) | ||||
| 5.28, d (7.8) | 111.37 | |||
| Quercetin 3-O- rhamnoside | 6.28, d (2) | 449.0954 | 303.0460, 181.0855, 153.0940 | |
| 7.02, d (8.5) | ||||
| 7.36, d (2) | ||||
| 7.56, dd (8, 2) | ||||
| 5.18, d (7.8) | 95.72 | |||
| 0.90, d (1.1) | 19.51 | |||
| Quercetin 3-O- glucoside | 7.02, d (8.5) | 465.0898 | 303.0466, 153.3540 | |
| 7.36, d (2) | ||||
| 7.56, dd (8, 2) | ||||
| 5.18, d (7.8) | 95.43 | |||
| Quercetin 3-O-xyloside | 6.28, d (2) | 435.0801 | 303.0451, 181.6037, 153.8779 | |
| 7.02, d (8.5) | ||||
| 7.36, d (2) | ||||
| 7.56, dd (8, 2) | ||||
| 5.07, d (8.) | 104.71 | |||
| Rutin | 6.28, d (2) | 611.1366 | 465.0893, 303.0466 | |
| 7.02, d (8.5) | ||||
| 7.36, d (2) | ||||
| 7.56, dd (8, 2) | ||||
| 4.99, d (7.5) | 105.01 | |||
| 3.78, d (1.5) | 65.20 | |||
| 4.39, d (1.5) | 101.93 | |||
| 0.92, d (6.6) | 19.06 | |||
| Chlorogenic acid | 3.52, dd (10, 4) | |||
| Fatty acid | 1.32, m | |||
| Acetic acid | 1.92, s | |||
| Catechin | 2.56, dd (16, 7.5) | |||