### Cepharanthine: Product Overview
**Definition**
Cepharanthine is a natural bisbenzylisoquinoline alkaloid extracted from the plant *Stephania cephalantha Hayata*. It is a white crystalline powder with the molecular formula C₃₇H₃₈N₂O₆ and a molecular weight of 606.71. Known for its diverse pharmacological properties, it is widely used in medical and research fields.
**Function**
Cepharanthine exhibits multiple biological activities, including:
- **Antiviral Effects**: Strongly inhibits SARS-CoV-2 replication, with an IC50 value of 1.90 µM.
- **Anti-inflammatory and Antioxidant Properties**: Reduces inflammation by suppressing TNF-α and NF-κB pathways.
- **Antitumor Activity**: Induces cell cycle arrest and apoptosis in cancer cells, such as SaOS2 cells.
- **Immunomodulation**: Promotes bone marrow tissue proliferation, increasing white blood cell counts.
**Applications**
1. **Pharmaceuticals**: Used in antiviral and anticancer drug formulations, as well as treatments for leukopenia.
2. **Healthcare**: Effective in managing conditions like chemotherapy-induced leukopenia and viral infections.
3. **Research**: Studied for its potential in treating COVID-19 and other viral diseases.