Structure-Activity Relationship article 144 nonhuman 118 unclassified drug 110 structure activity relation 104 Animals 94 controlled study 94 priority journal 76 Humans 68 drug synthesis 64 human 64 chemistry 54 Molecular Structure 46 Dose-Response Relationship, Drug 44 drug structure 44 Trypanosoma cruzi 42 animal 40 metabolism 40 chemical structure 36 dose response 36 enzyme activity 36 Article 34 drug screening 32 in vitro study 32 Models, Molecular 30 human cell 30 molecular dynamics 30 enzyme inhibition 28 synthesis 28 Amino Acid Sequence 26