Trimethoprim N-oxide (Trimethoprim 1-N-oxide) belongs to human urinary metabolites. Trimethoprim N-oxide is generated by oxidation of nitrogen atoms in the pyrimidine ring. Trimethoprim N-oxide is formed predominantly by CYP1A2 in human liver microsomes.

(E)-10-Hydroxy Nortriptyline maleate is a metabolite of Nortriptyline. Nortriptyline is a tricyclic antidepressant and the main active metabolite of Amitriptyline, and is used to relieve the symptoms of depression.

(Z)-10-Hydroxy Nortriptyline is a metabolite of Nortriptyline. Nortriptyline is a tricyclic antidepressant and the main active metabolite of Amitriptyline, and is used to relieve the symptoms of depression.

Desmethylnortriptyline is a metabolite of Nortriptyline. Nortriptyline is a tricyclic antidepressant and the main active metabolite of Amitriptyline, and is used to relieve the symptoms of depression.

O-Desmethyl apixaban is a metabolite of Apixaban (BMS-562247-01). Apixaban is a highly selective, reversible inhibitor of Factor Xa with Ki of 0.08 nM and 0.17 nM in human and rabbit, respectively.

Etilevodopa (L-Dopa ethyl ester), an ethyl-ester prodrug of Levodopa, is rapidly hydrolyzed to Levodopa and ethanol by nonspecific esterases in the gastrointestinal tract. Etilevodopa is used for the treatment of Parkinson disease (PD). Levodopa is the direct precursor of dopamine and is a suitable prodrug as it facilitates CNS penetration and delivers dopamine.

N-Desmethyl Clomipramine hydrochloride (Desmethylclomipramine hydrochloride) is a primary plasma N-desmethyl metabolite of Clomipramine. Clomipramine is a tricyclic antidepressant.

Pitavastatin lactone is a major metabolite of Pitavastatin in humans. Pitavastatin is a potent competitive inhibitor of HMG-CoA reductase little metabolized in hepatic microsomes.

4-Desmethoxy Omeprazole is the active metabolite of Omeprazole. Omeprazole, a proton pump inhibitor (PPI), is available for treatment of acid-related gastrointestinal disorders. Omeprazole shows competitive inhibition of CYP2C19 activity with a Ki of 2 to 6 μM. Omeprazole also inhibits growth of Gram-positive and Gram-negative bacteria.

3'-Hydroxy Repaglinide is a main CYP2C8 metabolite of Repaglinide. Repaglinide is a carbamoylmethyl benzoic acid (CMBA) derivative, which recently has become available for the treatment of type II diabetes.

Descarbamoyl cefuroxime is a degradation product of Cefuroxime. Descarbamoyl cefuroxime is also an intermediate for the synthesis of Cephalosporin antibiotics.

tert-Buthyl Pitavastatin is the  metabolite of Pitavastatin. Pitavastatin is a potent HMG-CoA reductase inhibitor.

Dihydro Dutasteride is a metabolite of Dutasteride. Dutasteride is a potent inhibitor of both 5 alpha-reductase isozymes.

5β-Dutasteride is the S configuration of Dutasteride. 5β-Dutasteride is a potent inhibitor of both 5 alpha-reductase isozymes.

4-Desmethyl Istradefylline is a metabolite of Istradefylline. 4-Istradefylline is a very potent, selective and orally active adenosine A2A receptor antagonist with Ki of 2.2 nM in experimental models of Parkinson's disease.

ent-Ezetimibe (ent-SCH 58235) is the RRS-enantiomer of Ezetimibe. Ezetimibe is a potent cholesterol absorption inhibitor. Ezetimibe is a Niemann-Pick C1-like1 (NPC1L1) inhibitor, and is a potent Nrf2 activator.

Desmethyl Levofloxacin is a metabolite of Levofloxacin. Levofloxacin, a synthetic fluoroquinolone, is an antibacterial agent that inhibits the supercoiling activity of bacterial DNA gyrase, halting DNA replication.

Hydroxy desmethyl Bosentan (Ro 64-105) is a Bosentan metabolism produced by the cytochrome P450 enzymes CYP2C9 and CYP3A4 in the liver. Bosentan is a competitive and dual antagonist of endothelin-1 (ET) for the ETA and ETB receptors with Ki of 4.7 nM and 95 nM in human SMC, respectively. Bosentan can be used in treatment of pulmonary arterial hypertension.

Ezetimibe phenoxy glucuronide is the active metabolite of Ezetimibe. Antihyperlipoproteinemic activity. Ezetimibe is a potent cholesterol absorption inhibitor.

N-Desmethyl Pimavanserin (AC-279) is the active metabolite of Pimavanserin. Pimavanserin is a selective inverse agonist of the 5-HT2A receptor with pIC50 and pKd of 8.73 and 9.3, respectively.

3-Desacetyl Cefotaxime lactone is the active metabolite of Cefotaxime. Cefotaxime sodium salt is a third-generation cephalosporin antibiotic.

Trimetazidine-N-oxide is the major active metabolite of Trimetazidine. Trimetazidine is a selective long chain 3-ketoyl coenzyme A thiolase inhibitor with an IC50 of 75 nM. Trimetazidine is an effective antianginal agent, has anti-oxidant, anti-inflammatory, antinociceptive and gastroprotective properties.

Raloxifene N-Oxide is a Raloxifene oxidative degradation product.

Cinacalcet metabolite M4 is a metabolite of Cinacalcet. Cinacalcet is an orally active, allosteric agonist of Ca receptor (CaR), used for cardiovascular disease.

6-Hydroxybenzbromarone is the major metabolite of Benzbromarone with a longer half-life and greater pharmacological potency than the parent compound. 6-Hydroxybenzbromarone is a protein Eyes Absent 3 (EYA3) inhibitor with an IC50 value of 21.5 μM. 6-Hydroxybenzbromarone is an angiogenic agent, has strong inhibitory effects on cell migration, tubulogenesis, and angiogenic sprouting.

Enzalutamide carboxylic acid (MDV3100 carboxylic acid) is an inactive metabolite of Enzalutamide (MDV3100). Enzalutamide is an androgen receptor (AR) antagonist.

Bifenazate-diazene is a major degradation product of Bifenazate. Bifenazate is a selective carbazate acaricide and an insecticide.

Pseudoerythromycin A enol ether (LY267108) is a degradation product of Erythromycin. Pseudoerythromycin A enol ether has no significant antimicrobial activity.

Leukotriene D4 is one of the constituents of slow-reacting substance of anaphylaxis (SRS-A) produced by the metabolism of LTC4 by γ-glutamyl transpeptidase. Leukotriene D4 is the first cysteinyl-leukotriene metabolite of LTC4. Leukotriene D4-induced bronchoconstriction and enhanced vascular permeability contribute to the pathogenesis of asthma and acute hypersensitivity.

Cyclo(Tyr-Val) (Cyclo(L-Tyr-L-Val)) is a diketopiperazine secondary fungal metabolite originally isolated from N. gilva.

1'-Hydroxymidazolam is a primary active metabolite of Midazolam, and it is a neuronal depressant agent. 1'-Hydroxymidazolam could inhibit neuronal activity add to the effects of Midazolam.

(S)-O-Desmethyl Venlafaxine N-Oxide is a N-oxyde of (S)-O-Desmethyl Venlafaxine. O-Desmethyl Venlafaxine is an active metabolite of Venlafaxine. Venlafaxine is an antidepressant of the serotonin-norepinephrine reuptake inhibitor (SNRI) class.

8-Demethyl Ivabradine is a metabolite of Ivabradine. Ivabradine is an orally bioavailable, hyperpolarization-activated, cyclic nucleotide-gated (HCN) channel blocker.

(Rac)-Mono(3,5,5-trimethylhexyl) phthalate is a important metabolite of commonly used phthalate plasticizers. (Rac)-Mono(3,5,5-trimethylhexyl) phthalate has immuno-suppressive effect.

Mono(5-carboxy-2-ethylpentyl) phthalate (MECPP) is a metabolite of Di-(2-ethylhexyl) phthalate (DEHP). Di(2-ethylhexyl) phthalate is the predominant plasticizer added to rigid polyvinyl chloride (PVC) to impart flexibility, temperature tolerance, optical clarity, strength and resistance to kinking.

2-Aminoflubendazole is the metabolite of Benzimidazoles. Benzimidazoles (BZ) are a class of drugs with activities against fungi, protozoa, and helminthes.

Nordoxepin D3 hydrochloride (Desmethyldoxepin D3 hydrochloride) is the deuterium labeled Nordoxepin hydrochloride. Nordoxepin hydrochloride is an active metabolite of Doxepin hydrochloride, which is an orally active tricyclic antidepressant.

Apovincaminic acid hydrochloride salt is an orally active and brain-penetrant main active metabolite of Vinpocetine (VP). Apovincaminic acid hydrochloride salt exerts a neuroprotective type of action.

3'-Hydroxy Repaglinide D5 is the deuterium labeled 3'-Hydroxy Repaglinide. 3'-Hydroxy Repaglinide is a main CYP2C8 metabolite of Repaglinide.

3,4-Dehydro Cilostazol (OPC-13015) is an active metabolite of Cilostazol. 3,4-Dehydro Cilostazol is used for pharmacokinetic study.

GS-704277 is an alanine metabolite of Remdesivir. Remdesivir, a nucleoside analogue with effective antiviral activity, is highly effective in the control of SARS-CoV-2 (COVID-19) infection in vitro.

Tofacitinib metabolite-1 is a metabolite of Tofacitinib, a JAK inhibitor. Tofacitinib metabolite-1 can be used in the pharmacokinetics and metabolism studies of tofacitinib.

Simvastatin Acyl-β-D-glucuronide is a metabolite of Simvastatin. Simvastatin is a competitive inhibitor of HMG-CoA reductase with a Ki of 0.2 nM.

(Rac)-3′-Hydroxy simvastatin is a metabolite of Simvastatin. Simvastatin is a competitive inhibitor of HMG-CoA reductase with a Ki of 0.2 nM.

2-Hydroxy atorvastatin lactone is a metabolite of Atorvastatin. Atorvastatin is an orally active HMG-CoA reductase inhibitor, has the ability to effectively decrease blood lipids.

T-705RMP, a phosphorylated metabolite of T-705, exhibits a very weak inhibitory effect on the IMP dehydrogenase (IMPDH) activities of the host cells, with an IC50 of 601 μM.

6-Azathymine acid is a metabolite of Pymetrozine. Pymetrozine is active against plant-sucking insects, such as aphids and whiteflies in vegetables, cotton, field crops and fruits and affects the nervous regulation of feeding behavior.

ω-Hydroxy-DEET is a major metabolite of insect repellent N-N-diethyl-meta-toluamide (DEET). ω-Hydroxy-DEET has anti-proliferative effects. DEET is a spatial repellent and an irritant that commonly used to prevent contact with mosquitoes.

DCBA is a metabolite of insect repellent N-N-diethyl-meta-toluamide (DEET). The concentration of DCBA in urine can assess exposure to DEET.

4'-Hydroxy diclofenac is an orally active metabolite of Diclofenac by cytochrome P450 2C9 (CYP2C9). 4'-Hydroxy diclofenac has anti-inflammatory and analgesic properties.

(S)-(+)-O-Desmethyl Venlafaxine is a S-enantiomer of O-Desmethyl Venlafaxine. O-Desmethyl Venlafaxine is an active metabolite of Venlafaxine. Venlafaxine is an antidepressant of the serotonin-norepinephrine reuptake inhibitor (SNRI) class.

(R)-(-)-O-Desmethyl Venlafaxine D6 is the deuterium labeled (R)-(-)-O-Desmethyl Venlafaxine. O-Desmethyl Venlafaxine is an active metabolite of Venlafaxine. Venlafaxine is an antidepressant of the serotonin-norepinephrine reuptake inhibitor (SNRI) class.

(S)-(+)-O-Desmethyl Venlafaxine D6 is the deuterium labeled (S)-(+)-O-Desmethyl Venlafaxine. O-Desmethyl Venlafaxine is an active metabolite of Venlafaxine. Venlafaxine is an antidepressant of the serotonin-norepinephrine reuptake inhibitor (SNRI) class.

N-Desmethyl imatinib mesylate (Norimatinib mesylate) is a metabolite of Imatinib. Imatinib is a multi-target inhibitor of v-Abl, c-Kit and PDGFR.

Homovanillyl alcohol is a biological metabolite of Hydroxytyrosol. Hydroxytyrosol is a phenolic compound that is present in virgin olive oil (VOO) and wine. Homovanillyl alcohol protects red blood cells (RBCs) from oxidative injury and has protective effect on cardiovascular disease.

Paeoniflorgenin is a deglucosylated metabolite of Paeoniflorin.

Ferulic acid acyl-β-D-glucoside is a metabolite of Ferulic Acid. Ferulic acid is a novel fibroblast growth factor receptor 1 (FGFR1) inhibitor with IC50s of 3.78 and 12.5 μM for FGFR1 and FGFR2, respectively.

(E)-10-Hydroxynortriptyline (E-10-OH-NT) is a metabolite of Nortriptyline. Nortriptyline is a tricyclic antidepressant and the main active metabolite of Amitriptyline, and is used to relieve the symptoms of depression.

HMMNI (Hydroxy dimetridazole) is a hydroxy metabolite of Dimetridazole. Dimetridazole is a nitroimidazole class drug that combats protozoan infections.

Dasatinib metabolite M6 (Dasatinib carboxylic acid) is an oxidative metabolite of Dasatinib. Dasatinib is a potent and orally active dual Bcr-Abl and Src family tyrosine kinase.

N-(2-hydroxyethyl)-oxamic acid is formed when Metronidazole is reduced either chemically or by the action of the intestinal bacteria. Metronidazole, a nitroimidazole antibiotic, has activity against various protozoans and most Gram-negative and Gram-positive anaerobic bacteria.

16α-Hydroxyprednisolone is a stereoselective metabolite of the 22(R) epimer of the glucocorticoid budesonide via cytochrome P450 3A (CYP3A) enzymes.

Iso-Sagittatoside A is the metabolite of effective Erxian Decoction (EXD, a Chinese medicine prescription for menopausal syndromes) in rat plasma.

4-Hydroxyphenylbutazone is a metabolite of Phenylbutazone. Phenylbutazone, a nonsteroidal anti-inflammatory drug (NSAID), is an efficient reducing cofactor for the peroxidase activity of prostaglandin H synthase (PHS).

Homoeriodictyol is a flavonoid metabolite of Eriocitrin in plasma and urine. Eriocitrin is a strong antioxidant agent.

4'-Hydroxy diclofenac D4 is the deuterium labeled 4'-Hydroxy diclofenac. 4'-Hydroxy diclofenac is an orally active metabolite of Diclofenac by cytochrome P450 2C9 (CYP2C9). 4'-Hydroxy diclofenac has anti-inflammatory and analgesic properties.

Doxorubicinol hydrochloride (13-Dihydroadriamycin hydrochloride) is a secondary alcohol metabolite of Doxorubicin.

DP-1, a degradation product of SDC-TRAP-0063, is a fragment of Ganetespib. Ganetespib is a heat shock protein 90 (HSP90) inhibitor with anti-tumor activity.

cPrPMEDAP is an intermediate metabolite of GS-9219. cpr-PMEDAP functions as a prodrug of the guanine nucleotide analog PMEG and has antiproliferative activity. cPrPMEDAP is negatively charged at physiologic pH and has poor permeability into the skin.

SIN-1 (chloride) is the active metabolite of molsidomine. SIN-1 (chloride) exhibits potent vasorelaxant effect and inhibition of platelet aggregation. SIN-1 (chloride) decreases myocardial necrosis and reperfusion-induced endothelial dysfunction in models of myocardial ischemia-reperfusion.

MTIC is the active metabolite of Temozolomide (TMZ). MITC has lower bioavailability in the brain compared with TMZ, because the drug’s permeability through biological barriers and tumor cell membranes affects bioavailability. MITC exhibits low affinity to biological membrane.

Resveratrol-3-O-sulfate (sodium) is the metabolite of Resveratrol.

2-Hydroxyemodin is an active metabolite of emodin in the hepatic microsomes. Emodin is an anthraquinone present in fungal metabolites and constituent of rhubarb. 2-Hydroxyemodin proves to be mutagenic to Salmonella typhimurium TA1537 in the absence of activation system.

5-(3-hydroxyphenyl)-5-phenylhydantoin, is a metabolite of anti-seizure agent Phenytoin.

Nordoxepin hydrochloride is the major metabolite of Doxepin. Doxepin is a tricyclic antidepressant that is widely prescribed for the treatment of mild depression.

N-Desalkyludenafil is a metabolite of Udenafil. Udenafil is a PDE5 inhibitor used for the research of the erectile dysfunction.

Isokotanin B is a metabolite of bicoumarin isolated from the sclerotia of Aspergillus alliaceus. Isokotanin B shows activity against the corn earworm Helicoverpa zea and the dried fruit bettle Carpophilus hemipterus.

Hydroxy ritonavir is a metabolite of Ritonavir. Ritonavir is an inhibitor of HIV protease used to treat HIV infection and AIDS.

3-Amino-2-oxazolidinone-d4 is a deuterium labeled 3-Amino-2-oxazolidinone. 3-Amino-2-oxazolidinone (AOZ) is the metabolite of Furazolidone. 3-Amino-2-oxazolidinone is always be detected as an indicator of furazolidone residues.

Curcumin monoglucuronide is known as a glucuronic acid conjugate, which is one of the in vivo metabolites of curcumin. Curcumin monoglucuronide is used for research on the metabolism of curcumin and examination of its development as a pharmaceutical. Curcumin monoglucuronide has the potential for the research of cancer disease (extracted from patent WO2022004873A1).

14(S)-HDHA (14(S)-HDoHE) is an oxygenation product of Docosahexaenoic acid (DHA). 14(S)-HDHA is a marker reflecting activation of a Docosahexaenoic acid carbon 14-lipoxygenation pathway.

Imipramine N-oxide is the metabolite of Imipramine. Imipramine is a tertiary amine tricyclic antidepressant.

Sonidegib metabolite M48 is the main circulating metabolite of Sonidegib. Sonidegib is a hedgehog pathway inhibitor. M48 showed a much longer Tmax (60 h) than Sonidegib.

PHA-782584 is a metabolite of sunitinib. Sunitinib is an oral multitargeted tyrosine kinase inhibitor with antitumor activities.

Ribavirin carboxylic acid (TR-COOH) is a metabolite of ribavirin, ribavirin has strong antiviral activity.

Desmethylazelastine is a main active metabolite of Azelastine that is oxidatively metabolized by the cytochrome P450 enzyme system with a protein binding rate of 97% and an elimination half-life of 54 hours. Azelastine is an orally active, selective and high-affinity histamine H1-receptor antagonist. Azelastine can be used in studies of allergic rhinitis, asthma, diabetic hyperlipidemic and SARS-CoV-2.

Levofloxacin N-oxide is a minor metabolite of Levofloxacin. Levofloxacin N-oxide does not exhibit significantly genotoxic risks. Levofloxacin is an orally active antibiotic and is active against both Gram-positive and Gram-negative bacteria.

Trimipramine N-oxide is an active metabolite of the tricyclic antidepressant trimipramine. Trimipramine N-oxide inhibits the human monoamine transporters for noradrenaline (hNAT), serotonin (hSERT), dopamine (hDAT) and the human organic cation transporters (hOCT1 and hOCT2) with IC50s of 11.7, 3.59, 9.4, 9.35 and 27.4 nM, respectively. Trimipramine N-oxide can be used for the research of depression and anxiety.

Ilaprazole sulfone is the major metabolite of Ilaprazole, is predominantly catalysed by CYP3A4/5. Ilaprazole (IY-81149) is an orally active proton pump inhibitor.

Ferulic acid 4-O-sulfate (Ferulic acid 4-sulfate) is a metabolite of Ferulic acid. Ferulic acid 4-O-sulfate relaxes arteries and lowers blood pressure in mice.

α-Demethylnaproxen is the major metabolite of Nabumetone, Nabumetone is an orally active COX-2 inhibitor with anti-inflammatory activity.

Abiraterone N-oxide is a metabolite of Abiraterone. Abiraterone is a potent and irreversible CYP17A1 inhibitor with antiandrogen activity.

Abiraterone sulfate is a metabolite of Abiraterone. Abiraterone is a potent and irreversible CYP17A1 inhibitor with antiandrogen activity.

7-Hydroxymethotrexate-d3 is the deuterium labeled 7-Hydroxymethotrexate. 7-Hydroxymethotrexate is a major metabolite of Methotrexate. Methotrexate, an antimetabolite and antifolate agent, inhibits the enzyme dihydrofolate reductase, thereby preventing the conversion of folic acid into tetrahydrofolate, and inhibiting DNA synthesis.

S-Allylmercapturic acid is a biomarker of food intake (BFIs) for garlic consumption.