**Definition:**  

Stachydrine Hydrochloride is a natural compound derived from *Herba Leonuri* (Motherwort). It is a white to pale yellow crystalline powder with a molecular formula of C7H14ClNO2 and a melting point of 225°C.  

**Functions:**  

Stachydrine Hydrochloride is known for its cardiovascular benefits, including anti-myocardial hypertrophy activity and inhibition of the NF-κB signaling pathway. It also exhibits anti-proliferative effects on cancer cells, inducing cell cycle arrest and apoptosis.  

**Applications:**  

1. **Pharmaceuticals:** Used in treatments for cardiovascular diseases and as a potential anti-cancer agent.  

2. **Research:** Studied for its mechanisms in cell proliferation and apoptosis, particularly in breast cancer cells.  

3. **Traditional Medicine:** A key active ingredient in *Herba Leonuri*, utilized for its therapeutic properties.