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Additionally , the expression of hepatic fibrosis - related factors such as alpha - smooth muscle actin and transforming growth factor - beta 1 ( TGF - beta 1 ) , were reduced in rats treated with sinapic acid .
 sinapic acid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 sinapic acid