12209
First , quiescent mouse embryonic fibroblasts ( MEFs ) lacking Top2 beta were shown to be hypersensitive to CPT with prominent induction of apoptosis .
 Chemical: CPT
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: CPT