Compounds 106 and 107  176  were more selective for SARS‐CoV‐1 Mpro than other proteases like papain (106, 103 µM; 107, 87.24 µM), chymotrypsin (106, ~1 mM; 107, 10.4 µM), and trypsin (106, 362 µM; 107, 243 µM; Figure 28).