Deuterium (²H, D)

L-Methionine-¹³C,d₃ is the ¹³C- and deuterium labeled L-Methionine. L-Methionine is the L-isomer of Methionine, an essential amino acid for human development. Methionine acts as a hepatoprotectant.

L-Proline-d₃ is the deuterium labeled L-Proline. L-Proline is one of the twenty amino acids used in living organisms as the building blocks of proteins.

Betaine-d₉ (chloride) is the deuterium labeled Betaine chloride.

L-Methionine-d₃ is the deuterium labeled L-Methionine. L-Methionine is the L-isomer of Methionine, an essential amino acid for human development. Methionine acts as a hepatoprotectant.

Salicylic acid-d₆ is a deuterium labeled Salicylic acid (HY-B0167). Salicylic acid inhibits cyclo-oxygenase-2 (COX-2) activity independently of transcription factor (NF-κB) activation.

Estradiol-d₄ is the deuterium labeled Estradiol. Estradiol is a steroid sex hormone vital to the maintenance of fertility and secondary sexual characteristics in females. Estradiol upregulates IL-6 expression through the estrogen receptor β (ERβ) pathway.

Creatine-d₅ (monohydrate) is the deuterium labeled Creatine monohydrate. Creatine monohydrate, an endogenous amino acid derivative, plays an important role in cellular energy, especially in muscle and brain.

Calcitriol-d₆ is the deuterium labeled Calcitriol. Calcitriol is the active metabolite of vitamin D3 and an agonist of the vitamin D receptor (VDR).

DL-Norepinephrine-d₆ hydrochloride is the deuterium labeled DL-Norepinephrine hydrochloride. DL-Norepinephrine hydrochloride is an external racemic catecholamine neurotransmitter, which is an equal mixture of the left-handed (L-, with activity) and right-handed (D-, with very low or no activity) stereoisomers. DL-Norepinephrine hydrochloride after being labeled with tritium can be used as a tracer for the research on Parkinson's disease.

SN-38-d₃ is the deuterium labeled SN-38. SN-38 (NK012) is an active metabolite of the Topoisomerase I inhibitor Irinotecan. SN-38 (NK012) inhibits DNA and RNA synthesis with IC₅₀s of 0.077 and 1.3 μM, respectively.

Tropicamide (Ro 1-7683) is a selective M4 muscarinic acetylcholine receptor antagonist. When used as an eye drop, Tropicamide causes short-term mydriasis (pupil dilation) and cycloplegia. Tropicamide can be used in the research of neurological diseases, such as epilepsy.

L-Palmitoylcarnitine-d₃ hydrochloride is the deuterium labeled L-Palmitoylcarnitine hydrochloride. L-Palmitoylcarnitine hydrochloride, a long-chain acylcarnitine and a fatty acid metabolite, accumulates in the sarcolemma and deranges the membrane lipid environment during ischaemia. L-Palmitoylcarnitine hydrochloride inhibits KATP channel activity, without affecting the single channel conductance, through interaction with Kir6.2.

Estradiol-d₅ is deuterium labeled Estradiol. Estradiol is a steroid sex hormone vital to the maintenance of fertility and secondary sexual characteristics in females. Estradiol upregulates IL-6 expression through the estrogen receptor β (ERβ) pathway.

Hydrocortisone-d₄ is the deuterium labeled Hydrocortisone. Hydrocortisone (Cortisol) is a steroid hormone or glucocorticoid secreted by the adrenal cortex.

Acetaminophen-d₄ is the deuterium labeled Acetaminophen. Acetaminophen (Paracetamol) is a selective cyclooxygenase-2 (COX-2) inhibitor with an IC₅₀ of 25.8 μM; is a widely used antipyretic and analgesic agent. Acetaminophen is a potent hepatic N-acetyltransferase 2 (NAT2) inhibitor.

Choline-d₄ chloride is the d₄-labeled Choline chloride (HY-B1337). Choline chloride is an orally active methylxanthine derivative. Choline chloride exhibits weak antihistaminic and anticholinergic activities and potentiates the effects of histamine and acetylcholine. Choline chloride relaxes bronchial smooth muscle, dilates coronary and peripheral blood vessels, increases urine output and electrolyte excretion, stimulates locomotor activity in the central nervous system, and induces transient hypotension following a pressor phase. Choline chloride modulates sleep architecture by increasing wakefulness time and reducing slow-wave sleep, without altering the frequency or severity of nocturnal hypoxemia, apnea, or hypopnea events. Choline chloride is used in studies of bronchospasm, nocturnal asthma, and chronic asthma.

L-Aspartic acid-d₃ is the d₃-labeled L-Aspartic acid (HY-N0666). L-Aspartic acid is a NMDA receptor agonist and acidic amino acid. L-Aspartic acid has no independent analgesic activity. L-Aspartic acid can antagonize the analgesic effects of D-Aspartic acid and Morphine. L-Aspartic acid regulates polymorph transformation, crystal growth/aggregation and nucleation processes of calcium carbonate, and can serve as a biomineralization template. L-Aspartic acid promotes burst firing of central neurons. L-Aspartic acid can be used in studies related to cerebral ischemia and epilepsy.

L-Arginine-d₇ (hydrochloride) is the deuterium labeled L-Arginine hydrochloride. L-Arginine hydrochloride ((S)-(+)-Arginine hydrochloride) is the nitrogen donor for synthesis of nitric oxide, a potent vasodilator that is deficient during times of sickle cell crisis.

L-Glutamic acid-d₃ is the deuterium labeled L-Glutamic acid. L-Glutamic acid acts as an excitatory transmitter and an agonist at all subtypes of glutamate receptors (metabotropic, kainate, NMDA, and AMPA). L-Glutamic acid shows a direct activating effect on the release of DA from dopaminergic terminals.

SDMA-d₆ is the deuterium labeled SDMA. SDMA (Symmetric dimethylarginine) is an endogenous inhibitor of nitric oxide (NO) synthase activity.