Arrow Therapeutics is a London-based pharmaceutical company focussed exclusively on research and development of novel antiviral drugs. The company has developed a broad pipeline of early and late stage projects at various stages between early research and clinical development. Their in-house research has resulted in compounds active against Hepatitis C and Respiratory Syncytial Virus. The leading RSV compound is currently in a phase II clinical trial and was the cornerstone of a deal with Novartis to develop and commercialise the small molecule inhibitor RSV604 (previously known as A-60444) for the treatment of Respiratory Syncytial Virus. Further breakthroughs have lead to their acquisition by AstraZeneca, for circa $150m cash.