Sildenafil Citrate(Viagra) 171599-83-0 Specifications: Specialize in various of steroids High business reputation & credibility 100% High quality and very competitive price Stock up within 24hr 24hr online service Welcome to inquiry our products Identification Name Sildenafil citrate Molecular Formula C28H38N6O11S Molecular Weight 666.70 CAS Registry Number 171599-83-0