O=C(CCl)N1CCN(S(=O)(=O)c2c(F)cccc2F)[C@H](c2ccccc2)C1
O=C(CCl)N1CCN(S(=O)(=O)c2c(F)cccc2F)c2ccncc21
O=C(CCl)N1CCN(S(=O)(=O)c2c(F)cccc2F)C2(CCOC2)C1
Building on covalent binding fragment Mpro-x0755. Attempt to fill pocket that extends out towards Glu166 by eye.