Chemical name: 2,4-Imidazolidineione-5,5-diphenyl-3-[(phosphonooxy)]-disodium salt
Structural formula:

Molecular formula and weight:C₁₆H₁₃N₂Na₂O₆P               M=406.24
Properties:white or white-like crystalline powder, easily soluble in water, insoluble in chloroform.
Action and use: anticonvulsant.
Packing:Stored in sealed vessel.