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By genetic perturbations and metabolic rescue , we provide evidence to illustrate that fat body dSir2 mediates its effects on the muscles via free fatty acids ( FFA ) and dILPs ( from the insulin - producing cells [ IPCs ] ) .
 Chemical: fatty acids
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: fatty acids