7757
In an effort to further understand this region of the molecule , analogues containing various N ' - amino substituents were prepared and evaluated against two breast cancer cell lines for determination of their efficacy .
 Chemical: N ' - amino
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: N ' - amino