Stachydrine (hydrochloride) (CAS No 4136-37-2) is an alkaloid found in plants such as Leonurus sibiricus It is studied in the category of cardiovascular and metabolic research due to its potential vasodilatory and cardioprotective effects The mechanism of action involves influencing pathways related to nitric oxide production and calcium channel modulation which can impact vascular smooth muscle relaxation In vitro activity is often observed in the nanomolar to low micromolar range indicating its potency in cellular assays Typical applications include studies in human endothelial cells rodent cardiac models and drug screening for cardiovascular benefits Experimental concentrations typically depend on the specific research design Stachydrine (hydrochloride) is integral to exploring therapeutic potentials for cardiovascular diseases contributing to the understanding of plant-derived bioactive compounds in modern pharmacology