All starting materials bind at the same location between helices B and C (Fig. ) and display a conserved binding mode where they interact with the protein via 2 pi-pi stackings and hydrogen bonding (Fig. ). All products bound cocrystals maintain a 4-formylpiperazine-1-carboxamide scaffold, where the piperazine moiety occupies the central hydrophobic cavity. Poses for the products also retained the original furan or the analogous thiophene or pyrrole rings, with some hits having either a 2-chlorine or methyl furan.