5389
Among them , only compounds 6 and 19 showed cytotoxicity against the MCF - 7 cell line [ inhibition ( % ) : 33 . 14 and 34 . 03 , respectively ] .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None