Structural formula:

Molecular formula:C₁₄H₉N₄NaO₅·3.5H₂O
Molecular weight:399.29
Property:It is orange to dark orange crystal powder with 3.5 crystal water,soluble in alkaline solution, easily soluble in propylene glycol, hard to be soluble in methanol and ethanol, very hard to be soluble in water or glacial acetic acid, almost insoluble in acetone,tetrahydrofuran or ether.
Specification:Enterprise standard(USP31 version Pharmacopoeia)
    Appearance:Yellowish-orange to orange crystalline powder.No visible evidence of contamination by foreign matter.
    Heavy metals:Not More Than 0.002%
    Water:14.5~17.0%
    Impurity A : ≤ 0.15%
    Impurity B : ≤ 0.50%
    Impurity C : ≤ 0.30%
    Assay: 90.0%~96.0%
Use:It is muscle relaxant used in the treatment of cerebral palsy,surgical trauma sequela,cervical spondylosis,myelitis,and multiple sclerosis etc.