Cc1ccc(S(=O)(=O)N2CCC(NC(=O)N(C)Cc3cc(C)on3)CC2)cc1
Cc1ccc(S(=O)(=O)N2CCN(C(=O)N(C)Cc3cc(C)on3)CC2)cc1
Cc1ccc(S(=O)(=O)N2CCN(C(=O)N(C)Cc3cccnc3)CC2)cc1
By eye and also building the compound and minimising in Flare to check the fit. Attempts to grow the covalent fragments e.g. x0731 containing the aryl sulfonamide piperazine and pick up H bonds with the His164 or Glu166. Frag x0397 suggests this is possible as it contains both the H bond to the backbone NH of Gly143 and to His164. Other aryl groups clearly possible on the sulfonamide.