Table 2.
Peak assignment of aqueous extracts of CCSC using HPLC-ESI-MS/MS in positive and negative ionization modes.
| Number | RT (min) | Molecular weight | HPLC-ESI-MS | Fragment ions | Identified compounds | |
|---|---|---|---|---|---|---|
| [M + H]+ m/z | [M − H]− m/z | |||||
| 1 | 7.8 | 198.05 | — | 197.04 | 135, 123 | Salvianic acid |
| 2 | 8.6 | 170.02 | — | 169.01 | 125, 107 | Gallic acid |
| 3 | 9.5 | 244.07 | — | 243.06 | 200, 152, 147, 110 | Uridine |
| 4 | 12.0 | 283.09 | — | 282.08 | 150, 133 | Guanosine |
| 5 | 21.6 | 251.10 | 252.11 | — | 136, 119 | Cordycepin |
| 6 | 34.3 | 388.14 | 389.14 | — | 227.1, 209, 195.1, 149 | Verbenalin |
| 7 | 37.0 | 180.04 | — | 179.03 | 135, 117 | Caffeic acid |
| 8 | 38.6 | 270.05 | — | 269.04 | 251, 179, 161, 135 | Baicalein |
| 9 | 42.6 | 390.15 | — | 389.14 | 227, 127 | Loganin |
| 10 | 44.9 | 358.13 | 359.13 | — | 197, 179, 151, 127 | Sweroside |
| 11 | 48.3 | 360.08 | — | 359.07 | 197, 179, 161, 135, 123 | Rosmarinic acid |
| 12 | 83.9 | 472.36 | 473.36 | — | 464, 416, 360, 351 | 2α-Hydroxy-ursolic acid |
| 13 | 84.9 | 800.49 | — | 799.48 | 637, 475.4 | Ginsenoside Rg1 |
| 14 | 84.9 | 946.55 | — | 945.54 | 783, 637, 475 | Ginsenoside Re |
| 15 | 97.7 | 374.10 | — | 373.09 | 179, 135 | Methyl rosmarinate |