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Chemical structure of some of the famous SARS-CoV-2 inhibitors hirsutenone, baicalein, and GRL0617 and their experimentally reported potencies, and also newly reported SARS-CoV-2 3CLpro fragment inhibitors A and B. The most active compounds CHA-12, CHA-37, CHA-297, CHA-378, and CHA-384 were selected as the promising chalcone-based structures for the inhibition of SARS-CoV-2 and identified by our preliminary in silico screening protocol.
