15332
Some of the compounds synthesized have shown encouraging inhibition of Sir 2 protein ( a yeast homologue of mammalian SIRT1 ) in vitro and three of them showed dose dependent inhibition of Sir 2 .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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