10554
In this study , we have synthesized a series of novel 5 - nitro - 2 - furancarboxylamides that show potent trypanocidal activity , ~ 1000 - fold more potent than nifurtimox against in vitro Trypanosoma brucei with very low cytotoxicity against human HeLa cells .
 Chemical: 5 - nitro - 2 - furancarboxylamides; Chemical: nifurtimox
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: 5 - nitro - 2 - furancarboxylamides; Chemical: nifurtimox