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The development of novel therapeutic agents for disorders of cognition such as Alzheimer ' s disease ( AD ) is of paramount importance given the ever - increasing elderly population , however ; there is also considerable interest in any strategy that might enhance the clinical efficacy of currently available treatments .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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