| 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (6-OH conjugated) DBMET02538 |  | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (6-OH conjugated) glycine conjugate |  | Details |
| 4-(6-Hydroxy-2-naphthyl)- butan-2-one DBMET02543 |  | Not Available | 4-(6-Hydroxy-2-naphthyl)- butan-2-one sulfate |  | Details |
| 4-(6-Hydroxy-2-naphthyl)- butan-2-one DBMET02543 | | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol |  | Details |
| 4-(6-Hydroxy-2-naphthyl)- butan-2-one DBMET02543 | | Not Available | 4-(6-Hydroxy-2-naphthyl)- butan-2-one glucuronide |  | Details |
| 4-(6-Hydroxy-2-naphthyl)- butan-2-one glucuronide DBMET02545 | | Not Available | 4-(6-Hydroxy-2-naphthyl)- butan-2-one glucuronide glycine conjugate |  | Details |
| 4-(6-Methoxy-2-naphthyl)- butan-2-ol DBMET02535 |  | Not Available | 4-(6-Methoxy-2-naphthyl)- butan-2-ol glucuronide |  | Details |
| 4-(6-Methoxy-2-naphthyl)- butan-2-ol DBMET02535 | | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol | | Details |
| 4-(o-carboxybenzamido)glutaramic acid DBMET01119 |  | Not Available | Isoglutamine / Phthalic Acid |   | Details |
| 4-(o-carboxybenzamido)glutaramic acid DBMET01119 | | Not Available | 2-(o-carboxybenzamido)glutaric acid |  | Details |
| 4-amino-antipyrine (AA) DBMET03543 |  | Not Available | 4-acetyl-amino-antipyrine (AAA) |  | Details |
| 4-Chlorobenzenesulfonylurea DBMET00201 |  | Not Available | 4-Chlorobenzenesulfonamide |  | Details |
| 4-desmethyltrimetazidine DBMET03345 |  | Not Available | 4-desmethyltrimetazidine O-sulphate |  | Details |
| 4-desmethyltrimetazidine DBMET03345 | | Not Available | 4-desmethyltrimetazidine O-glucuronide |  | Details |
| 4-ene-Valproic acid DBMET00060 |  | Not Available | 2,4-Diene-VPA |  | Details |
| 4-hydroxy duloxetine DBMET02503 |  | Not Available | 4-hydroxy duloxetine glucuronide |  | Details |
| 4-hydroxy-13-cis-retinoic acid DBMET02554 |  | Not Available | 4-oxo-13-cis-retinoic acid |  | Details |
| 4-Hydroxy-5-phenyltetrahydro-1,3-oxazin-2-one DBMET01096 |  | Alcohol dehydrogenase 1A | 5-Phenyl-1,3-oxazinane-2,4-dione |  | Details |
| 4-hydroxy-all-trans-retinoic acid DBMET02549 |  | Not Available | 4-oxo-all-trans-retinoic acid |  | Details |
| 4-Hydroxy-d-amphetamine DBMET03721 |  | Not Available | 4-Hydroxy-norephedrine |  | Details |
| 4-hydroxyalprazolam DBMET00348 |  | Not Available | alpha,4-dihydroxy-alprazolam |  | Details |
| 4-hydroxyalprazolam DBMET00348 | | Not Available | Alprazolam benzophenone metabolite |  | Details |
| 4-hydroxyamphetamine DBMET00733 |  | Not Available | 4-Hydroxynorephedrine |  | Details |
| 4-Hydroxyaripiprazole DBMET01612 |  | Not Available | Aripiprazole unnamed metabolite 1 |  | Details |
| 4-hydroxyatomoxetine DBMET00734 |  | Not Available | 4-hydroxyatomoxetine-O-glucuronide |  | Details |
| 4-Hydroxycyclophosphamide DBMET00019 |  | Cytochrome P450 3A7 | 4-Ketocyclophosphamide |  | Details |
| 4-Hydroxycyclophosphamide DBMET00019 | | Not Available | Aldophosphamide |  | Details |
| 4-Hydroxyestradiol DBMET01658 |  | Catechol O-methyltransferase | 4-methoxyestradiol |  | Details |
| 4-hydroxyestrone DBMET00332 |  | Not Available | 4-Hydroxyestradiol | | Details |
| 4-hydroxyethinylestradiol DBMET03023 |  | Catechol O-methyltransferase | 4-methoxyethinylestradiol |  | Details |
| 4-Hydroxyifosfamide DBMET00024 |  | Not Available | 4-Ketoifosfamide |  | Details |