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Design , synthesis and biological activity of multifunctional alpha , beta - unsaturated carbonyl scaffolds for Alzheimer ' s disease .
 Chemical: alpha , beta - unsaturated carbonyl
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: alpha , beta - unsaturated carbonyl