26376
Their antimicrobial activity against Escherichia coli , Staphyloccocus aureus , and Candida albicans , and their cytotoxic activity against human myeloid leukemia ( K562 ) and human lung adenocarcinoma ( A549 ) cell lines were also evaluated .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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