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Drugmaker Pfizer has begun Phase I clinical tests of PF-07304814, a small molecule that could be used to fight SARS-CoV-2, the virus that causes COVID-19 The compound targets the , an enzyme that coronaviruses like SARS-CoV-2 use to assemble themselves and multiply Mucking up that bit of self-replication machinery can shut down the viruses If approved, PF-07304814 would be the first antiviral drug to target this protein “We believe this potential first-in-class protease inhibitor may give us the best opportunity to show meaningful antiviral activity to help treat COVID-19 patients,” Mikael Dolsten, Pfizer’s chief scientific officer, said during a video presentation to investors on Sept 15 PF-07304814 contains a phosphate group that makes the compound soluble and gets cleaved by alkaline phosphatase enzymes in tissue, releasing the active antiviral PF-00835231 Pfizer chemists first discovered that active compound, which was designed to target the 3CL protease of SARS-CoV, during the 2002–3 [ ]
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