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Nucleoside inhibitors ( NI ) of HCV polymerase ( NS5B ) have demonstrated pan - genotypic activity and durable antiviral response in the clinic , and they are likely to become a key component of future treatment regimens .
 Chemical: Nucleoside
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: Nucleoside