Molecular formula: C₁₉H₂₈O₈
 Molecular weight: 384.43
Structural formula:

Physic hemical property: White crystalline powder.
Quality indexes:
Assay: ≥99%
Melting point: : 130~137°C
Specific rotation: +10o~+14o
Residue on ignition: ≤0.1%
Moisture: ≤0.5%
Acidity: 3.5-5.0
Chloride: ≤0.02%
Related substance: ≤1%
Packing: 10kg aluminium can
Uses: used in antimalarial.