10438
Novel sialidase inhibitors 11 having an alpha - acylaminoamido group at the C - 4 position of Neu5Ac2en 1 against human parainfluenza virus type 1 ( hPIV - 1 ) were synthesized using one - pot isocyanide - based four - component condensation , and their inhibitory activities against hPIV - 1 sialidase were studied .
 Chemical: alpha - acylaminoamido; Chemical: isocyanide
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: alpha - acylaminoamido; Chemical: isocyanide