13070
In this study , we tested chemotherapeutic potential of GBE in the MDA - MB - 231 ( ER - negative ) human breast cancer cell line . Our results showed that cytotoxicity effects of GBE in MDA - MB - 231 lead to DNA fragmentation at high concentrations ( 500 and 1 , 000 mu g / ml ) .
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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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