27028
The most active derivative in this study against both tested cell lines was the Schiff ' s base 4e with IC50 of 4 . 7 and 4 . 6 mu M against HT29 and MDA - MB231 , respectively .
 Chemical: Schiff ' s base
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Schiff ' s base 
Answer:
 Chemical: Schiff ' s base