20199
Furthermore , in the cytotoxicity assays , compound 1 showed potent inhibiting activity towards MCF - 7 and HL - 60 cancer cell lines with 50 % inhibition of cell growth ( IC50 ) values of 4 . 49 and 3 . 43 mu M , respectively , and compound 4 exhibited promising activity against HL - 60 cell line with an IC50 value of 0 . 6 mu M .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None