chemistry unclassified drug 10 animal 8 chemical structure 8 Animals 6 Article 6 Molecular Structure 6 article 6 controlled study 6 drug activity 6 drug effects 6 drug structure 6 nonhuman 6 synthesis 6 Humans 4 Withanolides 4 analogs and derivatives 4 dose response 4 drug effect 4 drug screening 4 drug synthesis 4 feeding behavior 4 growth inhibition 4 human 4 human cell 4 isolation and purification 4 metabolism 4 plant 4 salpichrolide A 4 salpichrolide G 4