Ledipasvir-d 6 is the deuterium labeled Ledipasvir. Ledipasvir (GS-5885) is an inhibitor of the hepatitis C virus NS5A, with EC50s of 34 pM and 4 pM against genotype 1a and 1b replicon, respectively. Ledipasvir is also a SARS-CoV 3CLpro inhibitor with an IC50 of 1.62 μM. In Vitro Stable heavy isotopes of hydrogen, carbon, and other elements have been incorporated into drug molecules, largely as tracers for quantitation during the drug development process. Deuteration has gained attention because of its potential to affect the pharmacokinetic and metabolic profiles of drugs. MCE has not independently confirmed the accuracy of these methods. They are for reference only. Form:Solid