Overview
Schisantherin B (五味子酯乙) is a dibenzocyclooctadiene lignan isolated from Schisandra chinensis, a medicinal plant widely used in Traditional Chinese Medicine (TCM). As one of the active constituents of Schisandra berries, it exhibits notable pharmacological effects, including liver protection, antioxidant activity, and modulation of the central nervous system. Its molecular structure features a unique tetrahydrofuran ring, contributing to its bioactivity. In industrial applications, Schisantherin B is primarily extracted via ethanol or supercritical CO2 methods, followed by chromatographic purification. It is classified as a high-value phytochemical, with demand driven by pharmaceutical R&D and nutraceutical formulations targeting liver health and oxidative stress management.
Physical and Chemical Properties
Schisantherin B presents as a white crystalline powder with a melting point range of 165-168°C. Its solubility profile favors organic solvents like methanol and ethanol, while water solubility is limited. The compound is stable under acidic conditions but may degrade under prolonged exposure to UV light or high temperatures (>80°C). Spectroscopic characterization typically includes UV absorption maxima at 220 nm and 254 nm, with IR spectra showing hydroxyl and aromatic ring signatures. Its molecular weight of 514.57 g/mol and lipophilic nature (LogP ≈ 3.5) influence its pharmacokinetic behavior, favoring membrane permeability but requiring formulation optimization for bioavailability enhancement.
Main Applications
In pharmaceuticals, Schisantherin B is investigated for hepatoprotective formulations, particularly in combating drug-induced liver injury (e.g., acetaminophen toxicity) and alcoholic liver disease. Its mechanism involves upregulation of antioxidant enzymes like glutathione peroxidase and suppression of pro-inflammatory cytokines. The nutraceutical industry incorporates it into liver-support supplements, often combined with silymarin or curcumin. TCM preparations utilize Schisantherin B as a marker compound for quality control in Schisandra extracts. Emerging research explores its potential in neuroprotection and anti-cancer adjuvants, though clinical evidence remains preliminary.
Safety and Storage
Schisantherin B exhibits low acute toxicity (LD50 >2,000 mg/kg in rodents) but requires standard laboratory precautions. Use PPE (gloves, goggles) when handling powder to avoid respiratory or ocular irritation. Storage at 2-8°C in amber glass vials with desiccants preserves stability for up to 24 months. Regulatory status varies by region: In China, it is approved as a medicinal ingredient, while FDA and EMA classify it as a dietary supplement component. Always verify local regulations before inclusion in products. Stability testing under ICH guidelines (25°C/60% RH for accelerated conditions) is recommended for commercial batches.
B2B Procurement Guide
When sourcing Schisantherin B, prioritize suppliers with ISO 9001 or GMP certification for herbal extracts. Key due diligence points include batch-specific HPLC purity reports (≥98% preferred), residual solvent analysis (e.g., ethanol <5,000 ppm), and heavy metal testing (As/Cd/Pb/Hg limits per USP <232>). Bulk pricing tiers typically start at 100g quantities, with discounts available for multi-kilogram orders. Consider extraction method (CO2 vs. ethanol) based on application needs—CO2 extracts generally have lower solvent residues. For international shipments, ensure proper documentation for customs clearance, including phytosanitary certificates for plant-derived materials.