Famotidine was acquired from Sigma Aldrich (Missouri, USA; cat. No. F6889). Compound 6, a previously reported inhibitor of SARS-CoV-2 PLpro function21 (link) was acquired from MedChem Express, Inc. (New Jersey, USA; cat no. HY-17542). ML188, a compound with known 3CLpro inhibitory activity15 was also acquired from MedChem Express, Inc. (cat. no HY-136259). Similarly, remdesivir. (cat. No HY-104077) an inhibitor of SARS-CoV-2 replication2 (link) was purchased from the same vendor. All compounds were dissolved in 100% DMSO at 100 mM.
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