Also available in 1 mg 10 mg 25 mg 50 mg 100 mg 500 mg 1 mL 10 mM (in DMSO) and bulk. Please contact Fisher for quotes. SARS-CoV-2-IN-13 (compound 5) is an analogue of niclosamide. SARS-CoV-2-IN-13 is more stable than niclosamide in human plasma and liver S9 enzymes assay. SARS-CoV-2-IN-13 can improve bioavailability and half-life when administered orally. SARS-CoV-2-IN-13 is a potent SARS-CoV-2 inhibitor with an IC 50 of 0.057 uM [1]. purity: 98%