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Article Abstract

A series of novel M inhibitors was designed and synthesized to combat the coronavirus, such as HCoV-OC43 and SARS-CoV-2, and several compounds showed comparable antiviral activity to nirmatrelvir. Among them, an octahydroindole-based peptidomimetic covalent inhibitor showed strong inhibitory activity against Ms and exhibited broad-spectrum anticoronavirus activity with EC values ranging from 0.027 to 4.41 μM. Besides, this compound displayed potent antiviral activity against EV71. Compared to , displayed better pharmacokinetic properties, and the value of oral bioavailability in CD-1 mice and Beagle dogs was improved to 10.4 and 10.2%, respectively. In addition, oral treatment with could significantly reduce the viral loads of HCoV-OC43 in mice, and compound could also effectively reduce lung viral loads in a K18-hACE2 transgenic mouse model without ritonavir. Taken together, compound is a promising orally bioavailable broad-spectrum antiviral drug candidate that deserves further research.

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http://dx.doi.org/10.1021/acs.jmedchem.4c03024DOI Listing

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