19786
A novel approach towards excitotoxicity protection and oxidative stress associated with excess beta amyloid ( A beta ) preservation in AD is represented by selective glutamatergic antagonists that possess as well antioxidant capabilities .
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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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