l-α-tocopherol acetate-13C4,d6 is the 13C- and deuterium-labeled l-α-tocopherol acetate. l-α-tocopherol acetate is a natural tocopherol and has potent antioxidant activities.

L-Kynurenine sulfate, an aryl hydrocarbon receptor (AHR) agonist that activates AHR-directed, naive T cell polarization to the anti-inflammatory Treg phenotype.

Guanidinoethyl sulfonate (Taurocyamine), a transport antagonist of taurine, induces much urinary taurine excretion with a resulting decrease in the tissue taurine content and readily produces taurine-deficient fetal rats in pregnant rats. Guanidinoethyl sulfonate, a structural analogue of taurine, acts as a competitive inhibitor of taurine transport.

Ac-β-Ala-OH (N-Acetyl-β-alanine), an abnormal amino acid metabolite, is a mono-N-protected amino acid (MPAA) ligand.

9-PAHPA is a fatty acid esters of hydroxy fatty acid (FAHFA). FAHFAs are a new family of endogenous lipids, have antidiabetic and anti-inflammatory effects.

6-trans-12-epi-Leukotriene B4, an arachidonic acid metabolite, is a potent anti-inflammatory agent.

BOC-L-Phenylalanine-13C is a 13C-labeled BOC-L-Phenylalanine. BOC-L-Phenylalanine is a derivative of Phenylalanine.

Pyridoxine-13C4 (Pyridoxol-13C4) hydrochloride is the 13C-labeled Pyridoxine (hydrochloride). Pyridoxine hydrochloride (Pyridoxol; Vitamin B6) is a pyridine derivative. Pyridoxine (Pyridoxol; Vitamin B6) exerts antioxidant effects in cell model of Alzheimer's disease via the Nrf-2/HO-1 pathway.

Thiamine-13C3 (Thiamine chloride-13C3) hydrochloride is the 13C-labeled Thiamine (hydrochloride). Thiamine hydrochloride (Thiamine chloride hydrochloride) is an essential micronutrient needed as a cofactor for many central metabolic enzymes.

Retinol-d6 (Vitamin A1-d6) is the deuterium labeled Vitamin A. Retinol is an endogenous metabolite.

2-Methoxyestrone-13C6 is the 13C-labeled 2-Methoxyestrone. 2-Methoxyestrone is a methoxylated catechol estrogen and metabolite of estrone, with a pKa of 10.81.

2-Hydroxyestrone-13C6 (Catecholestrone-13C6) is the 13C-labeled 2-Hydroxyestrone. 2-Hydroxyestrone (Catecholestrone) is a specific receptor-mediated antiestrogenic agent. 2-Hydroxyestrone is anticarcinogenic.

F-14329 is a tetramic acid fungal metabolite.

Butyrolactone II is a fungal metabolite isolated from Aspergillus flavipes.

1-Aminopropan-2-ol is a microbial metabolism of amino alcohol metabolism via propionaldehyde and acetaldehyde in a species of Pseudomonas.

2-Hydroxypalmitic acid is an intermediate in phytosphingosine metabolism.

Phenylacetyl CoA is an acceptor oxidoreductase. Phenylacetyl CoA is a membrane-bound molybdenum–iron–sulfur enzyme involved in anaerobic metabolism of phenylalanine in the denitrifying bacterium Thauera aromatica.

Eicosapentaenoic Acid (EPA)sodium is an orally active Omega-3 long-chain polyunsaturated fatty acid (ω-3 LC-PUFA). Eicosapentaenoic Acid sodium exhibits a DNA demethylating action that promotes the re-expression of the tumor suppressor gene CCAAT/enhancer-binding protein δ (C/EBPδ). Eicosapentaenoic Acid sodium activates RAS/ERK/C/EBPβ pathway through H-Ras intron 1 CpG island demethylation in U937 leukemia cells. Eicosapentaenoic Acid sodium can promote relaxation of vascular smooth muscle cells and vasodilation.

Murideoxycholic acid is a 6 beta-hydroxylated bile acid.

(Rac)-sn-Glycerol 3-phosphate is an a-site substrate analogue. (Rac)-sn-Glycerol 3-phosphate is bound to the a-site, the rate of reaction of indole and nucleophilic indole analogues with E(A-A) is strongly inhibited.

1,3,7-Trimethyluric acid is the metabolite of caffeine. The metabolic ratio 1,3,7-Trimethyluric acid to caffeine can be evaluated as a biomarker to describe variability in CYP3A activity in a cohort.

Cholic acid-13C is the 13C-labeled Cholic acid. Cholic acid is a major primary bile acid produced in the liver and usually conjugated with glycine or taurine. It facilitates fat absorption and cholesterol excretion.

Vitamin K1-d4 (Phylloquinone-d4) is the deuterium labeled Vitamin K1. Vitamin K1 a naturally occurring vitamin required for blood coagulation and bone and vascular metabolism.

7-Hydroxypestalotin (LL-P880β) is a fungal metabolite.

TMC-205 is a natural fungal metabolite with antiproliferative activity against cancer cell lines. TMC-205 is a transcriptional up-regulator of SV40 promoter.

Nicotinamide-13C6 (Niacinamide-13C6) is the 13C-labeled Nicotinamide. Nicotinamide is a form of vitamin B3 that plays essential roles in cell physiology through facilitating NAD+ redox homeostasis and providing NAD+ as a substrate to a class of enzymes that catalyze non-redox reactions. Nicotinamide is an inhibitor of SIRT1.

5-Hydroxyindole-3-acetic acid-13C6 is the 13C-labeled 5-Hydroxyindole-3-acetic acid. 5-Hydroxyindole-3-acetic acid is the main metabolite of serotonin or metanephrines, which can be used as a biomarker of neuroendocrine tumors.

Thiamine pyrophosphate-d3 is the deuterium labeled Thiamine pyrophosphate. Thiamine pyrophosphate is the coenzyme form of Vitamin B1 and is a required intermediate in the pyruvate dehydrogenase complex and the ketoglutarate dehydrogenase complex.

21-Deoxycortisol-d8 is the deuterium labeled 21-Deoxycortisol. 21-Deoxycortisol is an endogenous metabolite. 21-Deoxycortisol is a sign of congenital adrenal hyperplasia.

5a-Pregnane-3,20-dione-d6 is the deuterium labeled 5a-Pregnane-3,20-dione. 5a-Pregnane-3,20-dione is the endogenous progesterone metabolite.