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Mass spectra data and proposed structures of leonurine metabolites in rat.
| Metabolites | Retention time (min) | Protonated molecule [M + H]+ |
MSn product ion | Optimal MRM transitions | Description of metabolites |
|---|---|---|---|---|---|
| M0 | 8.1 | 312 | 295, 253, 181, 153, 132, 114, 97 | 312/181 | Parent |
| M1 | 4.9 | 488 | 312, 295, 253, 181, 132, 114, 97 | 488/312 | Glucuronidation |
| M2 | 6.9 | 392 | 312, 295, 253, 181, 153, 132, 114, 97 | 392/312 | Sulfation |
| M3 | 7.2 | 298 | 281, 167, 132, 114, 97 | 298/167 | O-demethylation |
