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External morphology and structural variations of thoracic appendages have been extensively studied using scanning electron microscope from flies treated with different concentrations of Thiovit Jet ( 20 , 30 , 40 or 200 mu g / ml ) .
 Chemical: Thiovit
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Thiovit 
Answer:
 Chemical: Thiovit