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Chemical structures of SARS-CoV and SARS-CoV-2 viral entry inhibitors: (A) emodin, (B) imatinib, (C) tetra-O-galloyl-beta-D-glucose (TGG), (D) luteolin, (E) N-(2-aminoethyl)-1-aziridineethanamine (NAAE), (F) chloroquine, (G) chlorpromazine, (H) E-64D, (I) 5705213, (J) camostat mesylate, and (K) nafamostat.
