4β-hydroxy Cholesterol is a major oxysterol cholesterol metabolite and a precursor in the synthesis of bile acids that is found in human circulation.

1,7-Dimethyluric acid is the metabolite of caffeine.

AFMK, antioxidant metabolite of Melatonin, attenuates X-ray-induced oxidative damage to DNA, proteins and lipids in mice. AFMK is a poorer scavenger. The pKa of AFMK at physiological pH is 8.7. Antioxidant capacity. AFMK improves the anti-tumor effect of Gemcitabine in PANC-1 cells through the modulation of apoptotic pathway.

Lignoceric acid (Tetracosanoic acid) is a 24-carbon saturated (24:0) fatty acid, which is synthesized in the developing brain. Lignoceric acid is also a by-product of lignin production. Lignoceric acid can be used for Zellweger cerebro‐hepato‐renal syndrome and adrenoleukodystrophy research.

Sphinganine 1-phosphate (D-erythro-Dihydrosphingosine 1-phosphate) is a polar sphingolipid metabolite that regulates cell migration, differentiation, survival and complex physiological processes.

trans-urocanic acid (trans-UCA), a natural epidermal constituent, inhibits human natural killer cell (NK) activity in vitro. trans-urocanic acid is active in regulating an immune function.

Streptolysin O, a group A streptococcal toxin, is a well-characterized oxygen-labile prototype of a cholesterol-binding bacterial exotoxin. Streptolysin O causes both lysis of cells and cardiotoxicity. Streptolysin O is widely used for the controlled permeabilization of cell membranes. Streptolysin O exists in two forms, a reduced active state and an oxidized reversibly inactive state .

L-Methionine sulfoxide (H-Met(O)-OH), a metabolite of Methionine, induces M1/classical macrophage polarization, and modulates oxidative stress and purinergic signaling parameters.

4-Hydroxytryptamine creatinine sulfate, a tryptamine derivative, is a neurotransmitter agonist.

Phosphoribosyl pyrophosphate (PRPP) pentasodium is an important metabolite required in the biosynthesis of purine and pyrimidine nucleotides, the amino acids histidine and tryptophan, and the cofactors NAD and NADP.

Triiodothyronine sulfate is the main metabolite of thyroid hormone triiodothyronine (T3). Triiodothyronine is an active form of thyroid hormone, which binds to β1 thyroid hormone receptor (TRβ1), and activates its activity.

Deutarserine is a deuterium modified analog of endogenous D-serine (CTP 692), which is used in the research of adults with schizophrenia.

Larsucosterol sodium is a cholesterol metabolite from the nuclei of normal human liver tissues, epigenetically regulates the transcription of proteins and enzymes involved in lipid synthesis, inflammation, and apoptosis.

Larsucosterol is a cholesterol metabolite from the nuclei of normal human liver tissues, epigenetically regulates the transcription of proteins and enzymes involved in lipid synthesis, inflammation, and apoptosis.

Ebaresdax can inhibit peroxynitrite oxidation derived by SIN-1 and peroxynitrite mediated Cytotoxicity with IC50s of 3.7±0.80 and 0.13±0.02 uM, respectively.

3-Oxo-4,6-choladien-24-oic acid is an endogenous metabolite. 3-Oxo-4,6-choladien-24-oic acid exsists in the urine of patients with hepatobiliary disease.

2,8-Dihydroxyadenine, an endogenous metabolite, can cause the formation of urinary crystals and kidney stones. 2,8-Dihydroxyadenine can be used to diagnose adenine phosphoribosyltransferase (APRT) deficiency.

Folitixorin (5,10-methylenetetrahydrofolate) is a cofactor and an analog of leucovorin. Folitixorin is a promising agent for modulation of 5-FU cytotoxicity in adjuvant cancer research.

Angiotensinogen (1-14), human TFA is a fragment of the renin substrate angiotensinogen. Angiotensinogen is naturally occurring substrate for renin and a precursor for all angiotensin peptides.

Vitamin K1 D7 (Phylloquinone D7) is the deuterium labeled Vitamin K1. Vitamin K1 a naturally occurring vitamin required for blood coagulation and bone and vascular metabolism.

Geranylgeranyl pyrophosphate is a metabolite involved in protein geranylgeranylation. Geranylgeranyl pyrophosphate is the common precursor of  diterpenoids, for example, Paclitaxel. Geranylgeranyl pyrophosphate can be used for cancer research.

S-Adenosyl-L-methionine D3 (S-Adenosyl methionine D3) is a deuterium labeled S-Adenosyl-L-methionine. S-Adenosyl-L-methionine is produced endogenously from methionine and ATP by action of the enzyme methionine adenosyltransferase and is an important orally active methyl group donor.

S-(5'-Adenosyl)-L-methionine iodide (S-Adenosyl-L-methionine iodide) is an important methyl donor that is found in all living organisms.

Lacto-N-biose I (Galβ1-3GlcNAc), as an endogenous metabolite, is an acceptor for the α1,2-fucosyltransferase enzyme from Helicobacter pylori.

16α-Hydroxyestrone (16αOHE) is a major Estradiol metabolite. 16α-Hydroxyestrone (16αOHE) can be used for the research of metabolic disease.

7-Methylguanosine 5'-diphosphate (7-Methyl-GDP) sodium, a cap analog, can be used in the synthesis of mRNA cap analogues.

Creatine D3 hydrate is a deuterium labeled Creatine hydrate. Creatine hydrate is pivotal in energy metabolism of muscle and brain cells, both in physiological and in pathological conditions.

Mevalonic acid 5-pyrophosphate (5-Diphosphomevalonic acid) tetralithium is an endogenous metabolite of the mevalonate pathway.

Kaempferol 3,4'-diglucoside is a flavonol isolated from the aqueous methanolic extract of norway spruce buds. Kaempferol 3,4'-diglucoside is identified in the needles.

N-Acetyloxytocin is isolated and characterized in the neurointermediate lobe of the rat pituitary (NIL) and their presence in several brain areas of the rat.