As determined by a single‐cycle infection assay (Table 1), IPB24, PB28, IPB29, and IPB30 inhibited the panel 1 viruses with the average IC50 values of 5.48, 6.39, 0.93, and 3.88 nM, respectively, in 293T/ACE2 cells and of 3.62, 4.54, 0.81, and 2.4 nM, respectively, in Huh‐7 cells. This evidence concerns the gene ACE2 and infection.