24436
Indotertine B ( 2 ) exists as a pair of rotamers about the N - C ( O ) bond with a 2 : 1 ratio and displays activities against HCT - 8 and A549 tumor cell lines with IC50 values of 6 . 96 and 4 . 88 mu M , respectively .
 Chemical: Indotertine B; Chemical: N - C ( O )
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: Indotertine B; Chemical: N - C ( O )