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The results clearly indicated the alkylides with improved antibacterial activity might possess a novel binding mode , which is different from clarithromycin and the alkylides with poor activity .
 Chemical: alkylides; Chemical: clarithromycin; Chemical: alkylides
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: alkylides; Chemical: clarithromycin; Chemical: alkylides