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Herein we report a structure - activity relationship study for the phthalazinone - based series that resulted in the discovery of benzofuranamide analogs that exhibit low nanomolar inhibition of CpIMPDH .
 Chemical: phthalazinone; Chemical: benzofuranamide
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: phthalazinone; Chemical: benzofuranamide