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Mass spectrometry conditions of tetramethylpyrazine, ferulic acid, nodakenin, and isoimperatorin.
| Component | Retention time (min) | Parent ion (m/z) | Daughter ion (m/z) | DP (V) | CE (V) |
|---|---|---|---|---|---|
| Tetramethylpyrazine | 1.13 | 137.20 | 55.00 | 68.00 | 30.00 |
| Ferulic acid | 1.28 | 195.00 | 177.10 | 54.00 | 14.00 |
| Nodakenin | 1.00 | 409.30 | 247.00 | 100.00 | 18.00 |
| Isoimperatorin | 5.82 | 271.10 | 203.00 | 99.00 | 17.00 |
