23884
The cytotoxicity results from the study suggested that the synthesized molecules are potential antitumor agents and compound 4a was the most potent with an IC 50 2 . 04 nM .
 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