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The interaction sites of several classes of phytocompounds on different domains of SARS-CoV-2 3-chymotrypsin like protease (3CLpro) including the catalytic dyad residues (His-41 and Cys-145; shown in purple). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.) (3CLpro domain organization is adapted from Joshi et al., 2020 [40])
