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These findings demonstrated that 3 , 3 - dibromoflavanone ( 31 ) , at doses that did not interfere with the motor performance , exerted clear dose dependent antinociception when assessed in the chemical and thermal models of nociception in mice and it seems that its action is related to the activation of the mu opioid receptor .
 Chemical: 3 , 3 - dibromoflavanone
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: 3 , 3 - dibromoflavanone