Table 4.
Nine metabolites of the drug paracetamol (acetaminophen) were individually detected in between 370 and 1102 of the 2807 blood samples, with a joint detection of all nine metabolites in 310 samples. LC/MS characteristics of the detected molecules are provided together with the biochemical detoxification pathway in which the respective molecules are involved (see text).
| Biochemical | N Detected (% of 2807) |
N Overlap (% of 17) |
LC/MS Mode |
Retention Index |
Mass | Pathway |
|---|---|---|---|---|---|---|
| 4-acetaminophen sulfate |
1102 (39.3%) | 16 (98.5%) | Neg | 1792 | 230.01287 | SULT |
| 4-acetamidophenyl glucuronide |
938 (33.4%) | 16 (98.2%) | Neg | 1400 | 326.08814 | UGT |
| 4-acetamidophenol | 708 (25.2%) | 15 (97.6%) | Neg | 2173.7 | 150.05605 | Paracetamol |
| 3-(methylthio) acetaminophen sulfate * |
621 (22.1%) | 14 (97.3%) | Neg | 2265 | 276.00059 | CYP/SULT |
| 2-hydroxyacetaminophen sulfate * |
575 (20.5%) | 14 (97.1%) | Neg | 1674 | 246.00778 | SULT |
| 2-methoxyacetaminophen glucuronide * |
419 (14.9%) | 13 (96.0%) | Neg | 1633 | 356.0987 | UGT |
| 2-methoxyacetaminophen sulfate * |
411 (14.6%) | 12 (95.9%) | Neg | 1949 | 260.02343 | SULT |
| 3-(N-acetyl-L-cystein-S-yl) acetaminophen |
370 (13.2%) | 11 (95.5%) | Neg | 2094 | 311.07072 | CYP |
| 3-(cystein-S-yl) acetaminophen * |
414 (14.7%) | 11 (96.0%) | Pos Early | 2420 | 271.07471 | CYP |
Biochemical name followed by ‘*’ indicates a com-pound that has not been officially confirmed based on a standard, but that Metabolon is confident in its identity.