Dantrolene sodium, Blocker of Ca2+ uptake and release from sarcoplasmic reticulum, Synonyms: 1-G[[[5-G(4-Gnitrophenyl)-G2-Gfuranyl]methylene]amino]-G2,G4-Gimidazolidinedione,G monosodium salt, CAS Number: 14663-23-1, Purity: G98%, Molecular Formula: C14H9N4NaO5, 100 mg