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Moreover , increase in histone acetylation by trichostatin A could also significantly enhance the protection effect of QU at 10 or 20 micro M but not at higher concentrations .
 Chemical: trichostatin A
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: trichostatin A