unclassified drug 62 article 53 nonhuman 36 controlled study 29 drug structure 27 Animals 26 chemical structure 26 withanolide 25 structure activity relation 23 drug synthesis 22 Humans 21 Molecular Structure 18 synthesis 18 Structure-Activity Relationship 17 human 17 steroid 17 conference paper 16 carbon nuclear magnetic resonance 15 proton nuclear magnetic resonance 15 chemistry 14 molecular model 14 nuclear magnetic resonance 12 Steroids 11 animal 11 drug receptor binding 11 human cell 11 ligand binding 11 molecular dynamics 11 Models, Molecular 10 Protein Binding 10