Drug Screening Assays, Antitumor Humans 32 article 30 human 28 unclassified drug 26 Antineoplastic Agents 22 drug screening 22 human cell 20 antineoplastic agent 18 Cell Line, Tumor 16 Structure-Activity Relationship 16 chemistry 16 Animals 14 controlled study 14 drug synthesis 14 proton nuclear magnetic resonance 14 Mice 12 Molecular Structure 12 Tumor Cells, Cultured 12 drug effects 12 drug structure 12 nonhuman 12 structure activity relation 12 synthesis 12 tumor cell line 12 Cell Proliferation 10 Dose-Response Relationship, Drug 10 antineoplastic activity 10 antiproliferative activity 10 carbon nuclear magnetic resonance 10