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Estrogenic potential of extracts from fish brain tissue was tested via Bromodeoxyuridine MCF - 7 analysis and paired with HPLC - MS to investigate the presence of xenoestrogens .
 Chemical: Bromodeoxyuridine; Chemical: xenoestrogens
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: Bromodeoxyuridine; Chemical: xenoestrogens