| 3-O-methyl-alpha-methyldopa DBMET00703 |  | Sulfotransferase | 3-O-methyl-alpha-methyldopa sulfate |  | Details |
| 3-OH-nabumetone DBMET02521 |  | Not Available | reduced 3-hydroxy-nabumetone |  | Details |
| 3-OH-nabumetone DBMET02521 | | Not Available | O-desmethyl-3-hydroxy-nabumetone |  | Details |
| 3-OH-nabumetone DBMET02521 | | Cytochrome P450 1A2 | 6-methoxy-2-naphthylacetic acid |  | Details |
| 3alpha-Hydroxydesogestrel DBMET00723 |  | 3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1 | Etonogestrel |  | Details |
| 4'-desethyl-drotaverine DBMET03303 |  | Not Available | 4'-desethyl-drotaveraldine |  | Details |
| 4'-Hydroxy-5-carboxylumiracoxib (M5) DBMET01285 |  | Sulfotransferase | Lumiracoxib metabolite M2 |  | Details |
| 4'-Hydroxy-5-carboxylumiracoxib (M5) DBMET01285 | | Not Available | Lumiracoxib metabolite M8 |  | Details |
| 4'-hydroxy-butyrfentanyl DBMET02691 |  | Not Available | 4'-hydroxy-3'-methoxy-butyrfentanyl |  | Details |
| 4'-hydroxyclobazam DBMET00743 |  | Cytochrome P450 3A4 / Cytochrome P450 2B6 / Cytochrome P450 2C9 | 4'-hydroxy-N-desmethylclobazam |  | Details |
| 4'-Hydroxydiclofenac DBMET00144 |  | Not Available | 4'-hydroxy-3'-glutathione conjugated diclofenac |  | Details |
| 4'-Hydroxydiclofenac DBMET00144 | | Not Available | 4'-hydroxy-2'-glutathione conjugated monoclofenac |  | Details |
| 4'-hydroxylumiracoxib (M23) DBMET01280 |  | Not Available | Lumiracoxib metabolite M25 |  | Details |
| 4'-hydroxylumiracoxib (M23) DBMET01280 | | UDP-glucuronosyltransferases (UGTs) | 4'-Carboxylumiracoxib glucuronide (M22) |  | Details |
| 4'-hydroxylumiracoxib (M23) DBMET01280 | | Not Available | Lumiracoxib metabolite M9 |  | Details |
| 4'-O-monodesmethyl istradefylline (M1) DBMET02750 |  | Not Available | M1 Glucuronide (M5) |  | Details |
| 4'-O-monodesmethyl istradefylline (M1) DBMET02750 | | Not Available | M1 Sulfate Conjugate (M4) |  | Details |
| 4'-OH-triamterene DBMET01771 |  | Sulfotransferase | 4'-OH-triamterene sulfate |  | Details |
| 4,4'-methanol-bisbenzonitrile DBMET00376 |  | UDP-glucuronosyltransferase 2B7 | Letrozole carbinol glucuronide metabolite |  | Details |
| 4- aminophenol DBMET02710 |  | Not Available | N-acetyl-4-Aminophenol |  | Details |
| 4- hydroxyphenelzine DBMET01955 |  | Not Available | 4-hydroxyphenylacetic acid |  | Details |
| 4-(4-guanidinobenzoyloxy)phenylacetic Acid DBMET03117 |  | Not Available | 4-guanidinobenzoic Acid |  | Details |
| 4-(6-hydroxy-2-naphthyl)- butan-2-ol DBMET02537 |  | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (6-OH conjugated) |  | Details |
| 4-(6-hydroxy-2-naphthyl)- butan-2-ol DBMET02537 | | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol sulfate |  | Details |
| 4-(6-hydroxy-2-naphthyl)- butan-2-ol DBMET02537 | | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (6-OH conjugated) | | Details |
| 4-(6-hydroxy-2-naphthyl)- butan-2-ol DBMET02537 | | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (2-OH conjugated) |  | Details |
| 4-(6-hydroxy-2-naphthyl)- butan-2-ol DBMET02537 | | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (2-OH conjugated) | | Details |
| 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (2-OH conjugated) DBMET02541 | | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (2-OH conjugated) glycine conjugate |  | Details |
| 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (2-OH conjugated) DBMET02541 | | Not Available | 4-(6-hydroxy-2-naphthyl)- butan-2-ol glucuronide (2-OH conjugated) glycine conjugate | | Details |
| 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 |