flavonoids, tannins, coumarins (melilotozid, coumarin and its derivatives), organic acids (coumaric, melilotovaya, etc.), carbohydrates, vitamins, essential oil.used as an emollient, expectorant, pain reliever for respiratory organs, climacteric ailments, pain in the bladder and kidney stones, migraines, purulent inflammation of the middle ear, headache, hypertension, atherosclerosis, psychosis; externally - with furuncles, mastitis, articular rheumatism , malignant tumors, as antibacterial.