Compound Name: Sildenafil EP Impurity B

Synonyms: 5-[2-Ethoxy-5-[(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one; 

CAS Number: 1094598-75-0

Molecular Formula: C22H30N6O5S

Molecular Weight: 490.58

Cat. Number: SIL1002