The pharmacophore model not only utilizes the molecular topological similarity but also the functional similarity of the groups, thus applying the concept of bioisosterism to make the model more reliable. If only the similarity of the shapes between the compounds is considered, the prediction of the binding mode will be wrong. If the molecular pharmacophore characteristics (hydrogen bond acceptor, hydrogen bond donor are taken into account) will correct this error. Non-structure Based Pharmacophore Model https://www.computabio.com/pha....rmacophore-model-ser