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Retention times and mass scan settings.
| Compound | Retention time (minutes) | Precursor ion (amu) | Product ion (amu) | Dwell time (ms) | Fragmentation voltage (V) | Collision energy (V) |
| EtSa | 0.34 | 124.9 | 96.9 | 23 | 40 | 11 |
| d5-EtS | 0.34 | 129.9 | 97.9 | 23 | 40 | 11 |
| EtGb | 0.55 | 220.9 | 84.9 | 23 | 40 | 15 |
| d5-EtG | 0.54 | 225.9 | 84.9 | 23 | 40 | 15 |
aEtS: ethyl sulfate.
bEtG: ethyl glucuronide.
