26399
Antiproliferation ( MTT ( = 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyl - 2H - tetrazolium bromide ) ) assays , combined with fluorescence - assisted cell sorting ( FACS ) and Western blot studies analyzing cell - cycle arrest confirmed the mechanism and potency of these biphenyl compounds in a range of human cancer cell lines .
 MTT, 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyl - 2H - tetrazolium bromide, biphenyl
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 MTT, 3 - ( 4 , 5 - dimethylthiazol - 2 - yl ) - 2 , 5 - diphenyl - 2H - tetrazolium bromide, biphenyl