Table 1.
Electrospray ionization-tandem spectroscopy (ESI-MS/MS) ions (positive ionization mode) of 13 analytes in Cordyceps sinensis.
| Analyte | Precursor Ion (m/z) | Product Ion (m/z) | Fragmentor | CE | CVA | Monitoring Mode |
|---|---|---|---|---|---|---|
| Cytosine | 112.0 | - | 180 | 0 | 0 | SIM |
| Uracil | 113.1 | 70.1 | 100 | 16 | 0 | MRM |
| Thymine | 127.0 | 110.0 | 100 | 16 | 0 | MRM |
| Adenine | 136.0 | - | 120 | 0 | 0 | SIM |
| Hypoxanthine | 137.0 | 110.0 | 135 | 20 | 5 | MRM |
| Guanine | 152.0 | - | 120 | 0 | 0 | SIM |
| Uridine | 245.0 | 113.0 | 85 | 2 | 5 | MRM |
| 2′-Deoxyuridine | 251.0 | 135.0 | 90 | 7 | 5 | MRM |
| Cordycepin | 252.1 | 136.0 | 80 | 15 | 4 | MRM |
| Thymidine | 265.1 | 149.0 | 100 | 10 | 4 | MRM |
| Adenosine | 268.1 | 136.0 | 100 | 16 | 3 | MRM |
| Guanosine | 284.0 | 152.0 | 70 | 7 | 5 | MRM |
| Inosine | 291.0 | 159.0 | 90 | 10 | 1 | MRM |