Custom synthesis Available Antibiotics & Antivirals Library Chemical Structure : Sisunatovir CAS No.: 1903763-82-5 聽 RV521(Sisunatovir) Catalog No.: URK-V607聽聽Only Used For Lab. RV521 (Sisunatovir) is a potent, orally active, small-molecule inhibitor of RSV fusion, demonstrates potent antiviral activity across multiple strains of RSV in vitro.. 聽 Biological Activity RV521 (Sisunatovir) is a...