Spermidine (N-(3-Aminopropyl)-1,4-diaminobutane) inhibits NOS1 (nNOS). Spermidine binds and precipitates DNA and may be used for purification of DNA binding proteins. Spermidine activates PNK (polynucleotide kinase T4). Spermidine binds to and activates NMDA and has been shown to potentiate NMDA-induced currents in a concentration-dependent manner.

Acetylcholine Chloride is the chloride salt form of acetylcholine, a synthetic, quaternary amino alcohol with cholinergic properties. Acetylcholine chloride (Pilofrin) mimics the parasympathomimetic effect of the endogenous compound acetylcholine. Administered as an ophthalmic solution, this drug stimulates the cholinoceptors in the sphincter muscle of the iris, causing the pupil to constrict.

Histamine dihydrochloride (Ceplene) is the dihydrochloride salt form of histamine, an endogenous metabolic product. Histamine is an organic nitrogen-containing compound with diverse biological activities. It acts as a potent stimulator of gastric acid secretion, a bronchial smooth muscle constrictor, and a vasodilator, as well as a neurotransmitter with central nervous system activity. It is commonly used to induce gastric ulcer models in research.

L-Histidinol dihydrochloride is a precursor of histamine and a reversible inhibitor of protein synthesis.

Agmatine sulfate (Agmatine sulfate salt) is a bioactive metabolite of the arginine amino acid. It exerts modulatory action at multiple molecular targets, such as neurotransmitter systems, ion channels and nitric oxide synthesis. It is an endogenous agonist at imidazoline receptor and a NO synthase inhibitor.

Trimethylamine N-oxide dihydrate (TMANO dihydrate) is a gut microbiota-dependent metabolite derived from dietary choline and other trimethylamine-containing nutrients. It induces inflammation by activating the ROS NLRP3 inflammasome and promotes fibroblast differentiation and cardiac fibrosis via the TGF-β Smad2 signaling pathway. TMANO dihydrate can be used to establish models of cardiac hypertrophy and cardiac fibrosis.

N tau-methylhistamine is one of the histamine metabolites. N tau-methylhistamine in plasma and urine is a good parameter for histamine release, and the determination of this histamine metabolite is generally less hampered by possible artifacts (due to bas

Methylguanidine (MG) is a guanidine compound deriving from protein catabolism. It is also a product of putrefaction. Methylguanidine is a suspected uraemic toxin that accumulates in renal failure, however it also exhibits anti-inflammatory effects. Methyl

Phosphorylcholine chloride calcium salt tetrahydrate (Phosphocholine chloride calcium salt tet) is a small haptenic molecule, is found in a wide variety of organisms. Human hepatic tumors undergo an elevation in the concentration of phosphorylcholine as the principal metabolic change is observed (PMID: 11076016 ). Phosphorylcholine chloride calcium salt tetrahydrate is the precursor metabolite of choline in the glycine, serine and threonine metabolism pathways (KEGG, map00260) and in intermediate between choline and cytidine-diphosphate choline in the glycerophospholipid metabolism pathway (KEGG, map00564).

Pentane-1,5-diamine dihydrochloride (Cadaverine dihydrochloride), dihydrochloride salt of cadaverine (a diamine), is a biogenic amine

2-Hydroxyphenethylamine has been found in human testicle tissue, and has also been primarily detected in blood. 2-Hydroxyphenethylamine can be converted into 2-(hydroxymethyl)-4-(1-hydroxy-2-{[6-(4-phenylbutoxy)hexyl]amino}ethyl)phenol.

Trimethylammonium chloride is a product of the breakdown of plants and animals and is a non-competitive acetylcholinesterase inhibitor.