19789
The physico - chemical properties and " in vitro " membrane permeability , the enzymatic and chemical stability , the demonstrated " in vitro " antioxidant activity associated to the capacity to inhibit A beta ( 1 - 42 ) aggregation makes at least compound 2 a promising candidate for treatment of AD patients .
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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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