2796
In particular , compound 3b with IC50 values of 10 - 19 mu g / mL was found to be the most active in this series and might be a potential lead structure for further optimization .
 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