28017
Cell - based studies showed that the flavonoid inhibits the sumoylation of topoisomerase - I in response to camptothecin treatment in two different breast cancer cell lines , while isomeric analogs are inactive .
 Chemical: camptothecin
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: camptothecin