Velpatasvir is a complex organic heteropentacyclic compound that is a hepatitis C virus nonstructural protein 5A inhibitor used in combination with sofosbuvir (under the brand name Epclusa) for treatment of patients with chronic hepatitis C of all six major genotypes. It has a role as an antiviral drug and a hepatitis C virus nonstructural protein 5A inhibitor. It is an organic heteropentacyclic compound, a N-acylpyrrolidine, a L-valine derivative, a carbamate ester, a member of imidazoles, a ring assembly and an ether.