10437
Syntheses of 2 - deoxy - 2 , 3 - didehydro - N - acetylneuraminic acid analogues modified by alpha - acylaminoamido groups at the C - 4 position using isocyanide - based four - component coupling and biological evaluation as inhibitors of human parainfluenza virus type 1 .
 Chemical: 2 - deoxy - 2 , 3 - didehydro - N - acetylneuraminic acid; 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: 2 - deoxy - 2 , 3 - didehydro - N - acetylneuraminic acid; Chemical: alpha - acylaminoamido; Chemical: isocyanide