O=C(CCl)N1CCN(S(=O)(=O)c2cccc(F)c2)CC1O
So, an oxyanion hole has been found to stabilize transition states with hydrogen bonding. Due to this space being blue and being called an oxyanion space in lecture. I think that by adding this hydroxy group there could be some interaction with histidine 41 (and positive charge in some pHs) in that blue pocket.