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Ingenuity Pathway Analysis also indicated that curcumin and miR - 34 are upstream regulators of histone - modifying enzymes ; future studies will seek to validate these results and examine the role of curcumin and miR - 34 in leukemia .
 curcumin, curcumin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 curcumin, curcumin