20760
Further effort generated the second - generation lead 41 , showing high potency against both the PARP1 enzyme and BRCA - deficient cells , especially for the BRCA1 - deficient MDA - MB - 436 cells ( CC50 < 0 . 26 nM ) .
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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:
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