Article 4 chemistry controlled study 4 in vitro study Animals 3 animal 3 drug cytotoxicity 3 human 3 human cell 3 metabolism 3 nonhuman 3 unclassified drug 3 Cell Line, Tumor 2 Humans 2 Male 2 animal experiment 2 animal model 2 animal tissue 2 antineoplastic activity 2 antineoplastic agent 2 drug effects 2 drug mechanism 2 drug screening 2 drug structure 2 immunophenotyping 2 in vivo study 2 male 2 tumor cell line 2 1,1-diphenyl-2-picrylhydrazyl 1 2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid 1