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In this work we evaluated the ability of suramin , a polysulfonated naphthylurea derivative , to antagonize the cytotoxic and enzymatic effects of the crude venom of Apis mellifera .
 Chemical: suramin; Chemical: polysulfonated naphthylurea
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: suramin; Chemical: polysulfonated naphthylurea