Catecholamines are biogenic amines derived of pirokatekhini. Soluble in water (only in some hot), poorly soluble in organic solvents. The most famous epinephrine, norepinephrine (hormones cerebral napochechnikov layer), 5-oxitriptofana, 5-oxitriptan (serotonin), 5-oxyanthracene acid.
Catecholamines play an important role in the body that are involved in the transmission of nerve impulses, affect the cardiovascular system and the metabolism. The number of catecholamines in the body increases after heavy muscular work, in myocardial infarction, jaundice. At occurrence of tumors in the body produces a large amount of serotonin, which is excreted with urine. Increased amounts of catecholamines in the urine can be used for diagnostics of a number of malignant diseases and preceding States. Preparations of adrenaline and noradrenaline are applied in shock, cardiac arrest, falling blood pressure. Some catecholamines (for example, 5-oxitriptofana) toxic.