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Since mesenchymal stem cells from various sources respond differently , further in vitro studies are needed to clarify the effect of salinomycin on tissue - specific stem cells .
 Chemical: salinomycin
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: salinomycin