CAS Number: 100632-58-4
Chemical Name: 1,4-Diketo Ibutilide
Molecular Formula: C20H32N2O4S
Molecular Weight: 396.55

CAS Number: 122647-32-9
Chemical Name: Ibutilide fumarate
Molecular Formula: C44H76N4O10S2
Molecular Weight: 885.23