6605
In addition , compounds 2 and 3 in combination reduced 1000 times the MIC of compound 1 , showing a clear synergistic interaction ( FICI < 0 . 15 ) in treatments against the Gram ( + ) bacterium .
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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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