CAS Number: 57-96-5
Chemical Name: Sulfinpyrazone
Molecular Formula: C23H20N2O3S
Molecular Weight: 404.48

CAS Number: 3736-92-3
Chemical Name: 1,2-Diphenyl-4-[2-(phenylsulfanyl)- ethyl]pyrazolidine-3,5-dione
Molecular Formula: C23H20N2O2S
Molecular Weight: 388.49