cancer cell culture human 8 human cell 8 in vitro study 8 unclassified drug 8 article 6 controlled study 6 Humans 4 priority journal 4 Article 3 Cell Line, Tumor 3 IC 50 3 antineoplastic activity 3 breast cancer 3 cell assay 3 cytotoxicity 3 drug structure 3 mouse 3 nonhuman 3 plant extract 3 3 (4,5 dimethyl 2 thiazolyl) 2,5 diphenyltetrazolium bromide 2 3,19 (2 bromobenzylidene)andrographolide 2 3,19 (3 bromobenzylidene)andrographolide 2 3,19 (3 chloro 4 fluorobenzylidene)andrographolide 2 Antioxidant activity 2 Cytotoxicity 2 Diterpenes 2 andrographolide 2 animal cell 2 animal experiment 2